Elderly woman with osteoporosis showing a curved back from compression fractures of her back bones.
Classification and external resources
Pronunciation /ˌɒstipəˈrss, -pɔː-/[1][2]
Specialty Rheumatology
ICD-10 M80-M82
ICD-9-CM 733.0
OMIM 166710
DiseasesDB 9385
MedlinePlus 000360
eMedicine med/1693 ped/1683 pmr/94 pmr/95
Patient UK Osteoporosis
MeSH D010024

Osteoporosis is a disease where decreased bone strength increases the risk of a broken bone. It is the most common reason for a broken bone among the elderly.[3] Bones that commonly break include the back bones, the bones of the forearm, and the hip.[4] Until a broken bone occurs there are typically no symptoms. Bones may weaken to such a degree that a break may occur with minor stress or spontaneously. Chronic pain and a decreased ability to carry out normal activities may occur following a broken bone.[3]

Osteoporosis may be due to lower than normal peak bone mass and greater than normal bone loss. Bone loss increases after menopause due to lower levels of estrogen. Osteoporosis may also occur due to a number of diseases or treatments including alcoholism, anorexia, hyperthyroidism, surgical removal of the ovaries, and kidney disease. Certain medications increase the rate of bone loss including some antiseizure medications, chemotherapy, proton pump inhibitors, selective serotonin reuptake inhibitors, and steroids. Not enough exercise and smoking are also risk factors.[3] Osteoporosis is defined as a bone density of 2.5 standard deviations below that of a young adult.[5] This is typically measured by dual-energy X-ray absorptiometry at the hip.[5]

Prevention of osteoporosis includes a proper diet during childhood and efforts to avoid medications that cause the condition. Efforts to prevent broken bones in those with osteoporosis include a good diet, exercise, and fall prevention. Lifestyle changes such as stopping smoking and not drinking alcohol may help.[3] Medication of the bisphosphonate type are useful in those with previous broken bones due to osteoporosis.[6][7] In those with osteoporosis but no previous broken bones they are less effective.[6][7][8] A number of other medications may also be useful.[3][9]

Osteoporosis becomes more common with age.[3] About 15% of white people in their 50s and 70% of those over 80 are affected.[10] It is more common in women than men.[3] In the developed world, depending on the method of diagnosis, 2% to 8% of males and 9% to 38% of females are affected.[11] Rates of disease in the developing world are unclear.[12] About 22 million women and 5.5 million men in the European Union had osteoporosis in 2010.[13] In the United States in 2010 about eight million women and one to two million men had osteoporosis.[11][14] White and Asian people are at greater risk.[3] The word osteoporosis is from the Greek terms for "porous bones".[15]

Signs and symptoms

Osteoporosis is an age-related disorder that causes the gradual loss of bone density and strength. When the thoracic vertebrae are affected, there can be a gradual collapse of the vertebrae. This results in kyphosis, an excessive curvature of the thoracic region.
Illustration depicting normal standing posture and osteoporosis

Osteoporosis itself has no symptoms; its main consequence is the increased risk of bone fractures. Osteoporotic fractures occur in situations where healthy people would not normally break a bone; they are therefore regarded as fragility fractures. Typical fragility fractures occur in the vertebral column, rib, hip and wrist.


Fractures are the most dangerous aspect of osteoporosis. Debilitating acute and chronic pain in the elderly is often attributed to fractures from osteoporosis and can lead to further disability and early mortality.[16] These fractures may also be asymptomatic. The most common osteoporotic fractures are of the wrist, spine, shoulder and hip. The symptoms of a vertebral collapse ("compression fracture") are sudden back pain, often with radicular pain (shooting pain due to nerve root compression) and rarely with spinal cord compression or cauda equina syndrome. Multiple vertebral fractures lead to a stooped posture, loss of height, and chronic pain with resultant reduction in mobility.[17]

Fractures of the long bones acutely impair mobility and may require surgery. Hip fracture, in particular, usually requires prompt surgery, as serious risks are associated with it, such as deep vein thrombosis and pulmonary embolism, and increased mortality.

Fracture risk calculators assess the risk of fracture based upon several criteria, including BMD, age, smoking, alcohol usage, weight, and gender. Recognized calculators include FRAX[18] and Dubbo.

The term "established osteoporosis" is used when a broken bone due to osteoporosis has occurred.[19] Osteoporosis is a part of frailty syndrome.

Falls risk

The increased risk of falling associated with aging leads to fractures of the wrist, spine, and hip. The risk of falling, in turn, is increased by impaired eyesight due to any cause (e.g. glaucoma, macular degeneration), balance disorder, movement disorders (e.g. Parkinson's disease), dementia, and sarcopenia (age-related loss of skeletal muscle). Collapse (transient loss of postural tone with or without loss of consciousness) leads to a significant risk of falls; causes of syncope are manifold, but may include cardiac arrhythmias (irregular heart beat), vasovagal syncope, orthostatic hypotension (abnormal drop in blood pressure on standing up), and seizures. Removal of obstacles and loose carpets in the living environment may substantially reduce falls. Those with previous falls, as well as those with gait or balance disorders, are most at risk.[20]

Risk factors

Risk factors for osteoporotic fracture can be split between nonmodifiable and (potentially) modifiable. In addition, osteoporosis is a recognized complication of specific diseases and disorders. Medication use is theoretically modifiable, although in many cases, the use of medication that increases osteoporosis risk may be unavoidable. Caffeine is not a risk factor for osteoporosis.[21]

It is more likely in females than males.[3]


Bone density peaks at about 30 years of age. Women lose bone mass more rapidly than men.[22]

Potentially modifiable

Medical disorders

The body regulates calcium homeostasis with two pathways; one is signaled to turn on when blood calcium levels drop below normal and one is the pathway that is signaled to turn on when blood calcium levels are elevated.

Many diseases and disorders have been associated with osteoporosis.[54] For some, the underlying mechanism influencing the bone metabolism is straightforward, whereas for others the causes are multiple or unknown.


Certain medications have been associated with an increase in osteoporosis risk; only steroids and anticonvulsants are classically associated, but evidence is emerging with regard to other drugs.


Age-related bone loss is common among humans due to exhibiting less dense bones than other primate species.[71] Because of the more porous bones of humans, frequency of severe osteoporosis and osteoporosis related fractures is higher.[72] The human vulnerability to osteoporosis is an obvious cost but it can be justified by the advantage of bipedalism inferring that this vulnerability is the byproduct of such.[72] It has been suggested that porous bones help to absorb the increased stress that we have on two surfaces compared to our primate counterparts who have four surfaces to disperse the force.[71] In addition, the porosity allows for more flexibility and a lighter skeleton that is easier to support.[72] One other consideration may be that diets today have much lower amounts of calcium than the diets of other primates or the tetrapedal ancestors to humans which may lead to higher likelihood to show signs of osteoporosis.[73]


Osteoporosis locations
Light micrograph of an osteoclast displaying typical distinguishing characteristics: a large cell with multiple nuclei and a "foamy" cytosol.
Light micrograph of osteoblasts, several displaying a prominent Golgi apparatus, actively synthesizing osteoid containing two osteocytes.

The underlying mechanism in all cases of osteoporosis is an imbalance between bone resorption and bone formation. In normal bone, matrix remodeling of bone is constant; up to 10% of all bone mass may be undergoing remodeling at any point in time. The process takes place in bone multicellular units (BMUs) as first described by Frost & Thomas in 1963.[74] Osteoclasts are assisted by transcription factor PU.1 to degrade the bone matrix, while osteoblasts rebuild the bone matrix. Low bone mass density can then occur when osteoclasts are degrading the bone matrix faster than the osteoblasts are rebuilding the bone.[75]

The three main mechanisms by which osteoporosis develops are an inadequate peak bone mass (the skeleton develops insufficient mass and strength during growth), excessive bone resorption, and inadequate formation of new bone during remodeling. An interplay of these three mechanisms underlies the development of fragile bone tissue.[26] Hormonal factors strongly determine the rate of bone resorption; lack of estrogen (e.g. as a result of menopause) increases bone resorption, as well as decreasing the deposition of new bone that normally takes place in weight-bearing bones. The amount of estrogen needed to suppress this process is lower than that normally needed to stimulate the uterus and breast gland. The α-form of the estrogen receptor appears to be the most important in regulating bone turnover.[26] In addition to estrogen, calcium metabolism plays a significant role in bone turnover, and deficiency of calcium and vitamin D leads to impaired bone deposition; in addition, the parathyroid glands react to low calcium levels by secreting parathyroid hormone (parathormone, PTH), which increases bone resorption to ensure sufficient calcium in the blood. The role of calcitonin, a hormone generated by the thyroid that increases bone deposition, is less clear and probably not as significant as that of PTH.[26]

The activation of osteoclasts is regulated by various molecular signals, of which RANKL (receptor activator of nuclear factor kappa-B ligand) (receptor activator of nuclear factor kappa-B ligand) is one of the best studied. This molecule is produced by osteoblasts and other cells (e.g. lymphocytes), and stimulates RANK (receptor activator of nuclear factor κB). Osteoprotegerin (OPG) binds RANKL before it has an opportunity to bind to RANK, and hence suppresses its ability to increase bone resorption. RANKL, RANK and OPG are closely related to tumor necrosis factor and its receptors. The role of the Wnt signaling pathway is recognized, but less well understood. Local production of eicosanoids and interleukins is thought to participate in the regulation of bone turnover, and excess or reduced production of these mediators may underlie the development of osteoporosis.[26]

Trabecular bone (or cancellous bone) is the sponge-like bone in the ends of long bones and vertebrae. Cortical bone is the hard outer shell of bones and the middle of long bones. Because osteoblasts and osteoclasts inhabit the surface of bones, trabecular bone is more active and is more subject to bone turnover and remodeling. Not only is bone density decreased, but the microarchitecture of bone is also disrupted. The weaker spicules of trabecular bone break ("microcracks"), and are replaced by weaker bone. Common osteoporotic fracture sites, the wrist, the hip and the spine, have a relatively high trabecular bone to cortical bone ratio. These areas rely on the trabecular bone for strength, so the intense remodeling causes these areas to degenerate most when the remodeling is imbalanced. Around the ages of 30–35, cancellous or trabecular bone loss begins. Women may lose as much as 50%, while men lose about 30%.[28]


Multiple osteoporotic wedge fractures demonstrated on a lateral thoraco-lumbar spine X-ray

The diagnosis of osteoporosis can be made using conventional radiography and by measuring the bone mineral density (BMD).[76] The most popular method of measuring BMD is dual-energy X-ray absorptiometry. In addition to the detection of abnormal BMD, the diagnosis of osteoporosis requires investigations into potentially modifiable underlying causes; this may be done with blood tests. Depending on the likelihood of an underlying problem, investigations for cancer with metastasis to the bone, multiple myeloma, Cushing's disease and other above-mentioned causes may be performed.

Conventional radiography

Conventional radiography is useful, both by itself and in conjunction with CT or MRI, for detecting complications of osteopenia (reduced bone mass; pre-osteoporosis), such as fractures; for differential diagnosis of osteopenia; or for follow-up examinations in specific clinical settings, such as soft tissue calcifications, secondary hyperparathyroidism, or osteomalacia in renal osteodystrophy. However, radiography is relatively insensitive to detection of early disease and requires a substantial amount of bone loss (about 30%) to be apparent on X-ray images.

The main radiographic features of generalized osteoporosis are cortical thinning and increased radiolucency. Frequent complications of osteoporosis are vertebral fractures for which spinal radiography can help considerably in diagnosis and follow-up. Vertebral height measurements can objectively be made using plain-film X-rays by using several methods such as height loss together with area reduction, particularly when looking at vertical deformity in T4-L4, or by determining a spinal fracture index that takes into account the number of vertebrae involved. Involvement of multiple vertebral bodies leads to kyphosis of the thoracic spine, leading to what is known as dowager's hump.

Dual-energy X-ray

Dual-energy X-ray absorptiometry (DXA) is considered the gold standard for the diagnosis of osteoporosis. Osteoporosis is diagnosed when the bone mineral density is less than or equal to 2.5 standard deviations below that of a young (30–40-year-old[5]:58), healthy adult women reference population. This is translated as a T-score. But because bone density decreases with age, more people become osteoporotic with increasing age.[5]:58 The World Health Organization has established the following diagnostic guidelines:[5][19]

Category T-score range % young women
Normal T-score ≥ −1.0 85%
Osteopenia −2.5 < T-score < −1.0 14%
Osteoporosis T-score ≤ −2.5 0.6%
Severe osteoporosis T-score ≤ −2.5 with fragility fracture[19]

The International Society for Clinical Densitometry takes the position that a diagnosis of osteoporosis in men under 50 years of age should not be made on the basis of densitometric criteria alone. It also states, for premenopausal women, Z-scores (comparison with age group rather than peak bone mass) rather than T-scores should be used, and the diagnosis of osteoporosis in such women also should not be made on the basis of densitometric criteria alone.[77]


Chemical biomarkers are a useful tool in detecting bone degradation. The enzyme cathepsin K breaks down type-I collagen protein, an important constituent in bones. Prepared antibodies can recognize the resulting fragment, called a neoepitope, as a way to diagnose osteoporosis.[78] Increased urinary excretion of C-telopeptides, a type-I collagen breakdown product, also serves as a biomarker for osteoporosis.[79]

Comparison of bone pathology
Condition Calcium Phosphate Alkaline phosphatase Parathyroid hormone Comments
Osteopenia unaffected unaffected normal unaffected decreased bone mass
Osteopetrosis unaffected unaffected elevated unaffected thick dense bones also known as marble bone
Osteomalacia and rickets decreased decreased elevated elevated soft bones
Osteitis fibrosa cystica elevated decreased elevated elevated brown tumors
Paget's disease of bone unaffected unaffected variable (depending on stage of disease) unaffected abnormal bone architecture

Other measuring tools

Quantitative computed tomography differs from DXA in that it gives separate estimates of BMD for trabecular and cortical bone and reports precise volumetric mineral density in mg/cm3 rather than BMD's relative Z score. Among QCT's advantages: it can be performed at axial and peripheral sites, can be calculated from existing CT scans without a separate radiation dose, is sensitive to change over time, can analyze a region of any size or shape, excludes irrelevant tissue such as fat, muscle, and air, and does not require knowledge of the patient's subpopulation in order to create a clinical score (e.g. the Z-score of all females of a certain age). Among QCT's disadvantages: it requires a high radiation dose compared to DXA, CT scanners are large and expensive, and because its practice has been less standardized than BMD, its results are more operator-dependent. Peripheral QCT has been introduced to improve upon the limitations of DXA and QCT.[76]

Quantitative ultrasound has many advantages in assessing osteoporosis. The modality is small, no ionizing radiation is involved, measurements can be made quickly and easily, and the cost of the device is low compared with DXA and QCT devices. The calcaneus is the most common skeletal site for quantitative ultrasound assessment because it has a high percentage of trabecular bone that is replaced more often than cortical bone, providing early evidence of metabolic change. Also, the calcaneus is fairly flat and parallel, reducing repositioning errors. The method can be applied to children, neonates, and preterm infants, just as well as to adults.[76] Some ultrasound devices can be used on the tibia.[80]


The U.S. Preventive Services Task Force (USPSTF) recommend that all women 65 years of age or older be screened by bone densitometry.[81] Additionally they recommend screening women with increased risk factors that puts them at risk equivalent to a 65‑year‑old.[81] There is insufficient evidence to make recommendations about the intervals for repeated screening and the appropriate age to stop screening.[81] In men the harm versus benefit of screening for osteoporosis is unknown.[81] The International Society for Clinical Densitometry, however, suggest BMD testing for men 70 or older, or those who are indicated for risk equal to that of a 70‑year‑old.[82] A number of tools exist to help determine who is reasonable to test.[83]


Lifestyle prevention of osteoporosis is in many aspects the inverse of the potentially modifiable risk factors.[84] As tobacco smoking and high alcohol intake have been linked with osteoporosis, smoking cessation and moderation of alcohol intake are commonly recommended as ways to help prevent it.[85]

In people with coeliac disease adherence to a gluten-free diet decreases the risk of developing osteoporosis[86] and increases bone density.[57] The diet must ensure optimal calcium intake (of at least one gram daily) and measuring vitamin D levels is recommended, and to take specific supplements if necessary.[86]


Studies of the benefits of supplementation with calcium and vitamin D are conflicting, possibly because most studies did not have people with low dietary intakes.[87] A 2013 review by the USPSTF found insufficient evidence to determine if supplementation with calcium and vitamin D results in greater harm or benefit in men and premenopausal women.[88] The USPSTF did not recommend low dose supplementation (less than 1 g of calcium and 400 IU of vitamin D) in postmenopausal women as there does not appear to be a difference in fracture risk.[88] It is unknown what effect higher doses have.[88] A 2015 review found little data that supplementation of calcium decreases the risk of fractures.[89]

While some meta-analyses have found a benefit of vitamin D supplements combined with calcium for fractures, they did not find a benefit of vitamin D supplements alone.[90][91]

While supplementation does not appear to affect the risk of death,[91] there is an increased risk of myocardial infarctions with calcium supplementation,[92][93] kidney stones,[88] and stomach problems.[91]

Vitamin K deficiency is also a risk factor for osteoporotic fractures. The gene gamma-glutamylcarboxylase (GGCX) is dependent on vitamin K. Functional polymorphisms in the gene could attribute to variation in bone metabolism and BMD. Vitamin K2 is also used as a means of treatment for osteoporosis and the polymorphisms of GGCX could explain the individual variation in the response to treatment of vitamin K.[94] Vitamin K supplementation may reduce the risk of fractures in postmenopausal women;[95] however, there is no evidence for men.[96]

Physical exercise

A 2011 review reported a small benefit of physical exercise on bone density of postmenopausal women.[97] The chances of having a fracture were also slightly reduced (absolute difference 4%).[97] People who exercised had on average less bone loss (0.85% at the spine, 1.03% at the hip).[97]



Weight-bearing endurance exercise and/or exercises to strengthen muscles improve bone strength in those with osteoporosis.[97][98] Aerobics, weight bearing, and resistance exercises all maintain or increase BMD in postmenopausal women.[99] Fall prevention can help prevent osteoporosis complications. There is some evidence for hip protectors specifically among those who are in care homes.[100]


Bisphosphonates are useful in decreasing the risk of future fractures in those who have already sustained a fracture due to osteoporosis.[6][7][85] This benefit is present when taken for three to four years.[101] Different bisphosphonates have not been directly compared, therefore it is unknown if one is better than another.[85] Fracture risk reduction is between 25 and 70% depending on the bone involved.[85] There are concerns of atypical femoral fractures and osteonecrosis of the jaw with long-term use, but these risks are low.[85][102] With evidence of little benefit when used for more than three to five years and in light of the potential adverse events, it may be appropriate to stop treatment after this time in some.[101] One medical organization recommends that after five years of medications by mouth or three years of intravenous medication among those at low risk, bisphosphonate treatment can be stopped.[103] In those at higher risk they recommend up to ten years of medication by mouth or six years of intravenous treatment.[103]

For those with osteoporosis but who have not had a fracture evidence does not support a reduction in fracture risk with risedronate[7] or etidronate.[8] Alendronate decreases fractures of the spine but does not have any effect on other types of fractures.[6] Half stop their medications within a year.[104]

Fluoride supplementation does not appear to be effective in postmenopausal osteoporosis, as even though it increases bone density, it does not decrease the risk of fractures.[105][106]

Teriparatide ( a recombinant parathyroid hormone ) has been shown to be effective in treatment of women with postmenopausal osteoporosis.[107] Some evidence also indicates strontium ranelate is effective in decreasing the risk of vertebral and nonvertebral fractures in postmenopausal women with osteoporosis.[108] Hormone replacement therapy, while effective for osteoporosis, is only recommended in women who also have menopausal symptoms.[85] Raloxifene, while effective in decreasing vertebral fractures, does not affect the risk of nonvertebral fracture.[85] And while it reduces the risk of breast cancer, it increases the risk of blood clots and strokes.[85] Denosumab is also effective for preventing osteoporotic fractures.[85] In hypogonadal men, testosterone has been shown to improve bone quantity and quality, but, as of 2008, no studies evaluated its effect on fracture risk or in men with a normal testosterone levels.[56] Calcitonin while once recommended is no longer due to the associated risk of cancer with its use and questionable effect on fracture risk.[109]

Certain medications like alendronate, etidronate, risedronate, raloxifene and strontium ranelate can be helpful for the preventing of osteoporotic fragility fractures in postmenopausal women with osteoporosis.[110]


Hip fractures per 1000 person-years[111]
WHO category Age 50–64 Age > 64 Overall
Normal 5.3 9.4 6.6
Osteopenia 11.4 19.6 15.7
Osteoporosis 22.4 46.6 40.6

Although osteoporosis patients have an increased mortality rate due to the complications of fracture, it is rarely lethal.

Hip fractures can lead to decreased mobility and additional risks of numerous complications (such as deep venous thrombosis and/or pulmonary embolism, and pneumonia). The six-month mortality rate following hip fracture is around 13.5%, and a substantial proportion (almost 13%) of people who have suffered a hip fracture need total assistance to mobilize after a hip fracture.[112]

Vertebral fractures, while having a smaller impact on mortality, can lead to a severe chronic pain of neurogenic origin, which can be hard to control, as well as deformity. Though rare, multiple vertebral fractures can lead to such severe hunch back (kyphosis), the resulting pressure on internal organs can impair one's ability to breathe.

Apart from risk of death and other complications, osteoporotic fractures are associated with a reduced health-related quality of life.[113]

The condition is responsible for millions of fractures annually, mostly involving the lumbar vertebrae, hip, and wrist. Fragility fractures of ribs are also common in men.

Hip fractures

Hip fractures are responsible for the most serious consequences of osteoporosis. In the United States, more than 250,000 hip fractures annually are attributable to osteoporosis.[114] A 50-year-old white woman is estimated to have a 17.5% lifetime risk of fracture of the proximal femur. The incidence of hip fractures increases each decade from the sixth through the ninth for both women and men for all populations. The highest incidence is found among men and women ages 80 or older.[115]

Vertebral fractures

Between 35 and 50% of all women over 50 had at least one vertebral fracture. In the United States, 700,000 vertebral fractures occur annually, but only about a third are recognized. In a series of 9704 women aged 68.8 on average studied for 15 years, 324 had already suffered a vertebral fracture at entry into the study and 18.2% developed a vertebral fracture, but that risk rose to 41.4% in women who had a previous vertebral fracture.[116]

Wrist fractures

In the United States, 250,000 wrist fractures annually are attributable to osteoporosis.[114] Wrist fractures are the third most common type of osteoporotic fractures. The lifetime risk of sustaining a Colles' fracture is about 16% for white women. By the time women reach age 70, about 20% have had at least one wrist fracture.[115]

Rib fractures

Fragility fractures of the ribs are common in men as young as age 35. These are often overlooked as signs of osteoporosis, as these men are often physically active and suffer the fracture in the course of physical activity. An example would be as a result of falling while water skiing or jet skiing. However, a quick test of the individual's testosterone level following the diagnosis of the fracture will readily reveal whether that individual might be at risk.


It is estimated that 200 million people have osteoporosis.[117] Osteoporosis becomes more common with age.[3] About 15% of White people in their 50s and 70% of those over 80 are affected.[10] It is more common in women than men.[3] In the developed world, depending on the method of diagnosis, 2% to 8% of males and 9% to 38% of females are affected.[11] Rates of disease in the developing world are unclear.[12]

There are 8.9 million fractures worldwide per year due to osteoporosis.[118] Globally, 1 in 3 women and 1 in 5 men over the age of 50 will have an osteoporotic fracture.[118] Data from the United States shows a decrease in osteoporosis within the general population and in white women, from 18% in 1994 to 10% in 2006.[119] White and Asian people are at greater risk.[3] People of African descent are at a decreased risk of fractures due to osteoporosis, although they have the highest risk of death following an osteoporotic fracture.[119]

It has been shown that latitude affects risk of osteoporotic fracture.[120] Areas of higher latitude such as Northern Europe receive less Vitamin D through sunlight compared to regions closer to the equator, and consequently have higher fracture rates in comparison to lower latitudes.[120] For example, Swedish men and women have a 13.% and 28.5% risk of hip fracture by age 50, respectively, whereas this risk is only 1.9% and 2.4% in Chinese men and women.[119] Diet may also be a factor that is responsible for this difference, as vitamin D, calcium, magnesium, and folate are all linked to bone mineral density.[121]

About 22 million women and 5.5 million men in the European Union had osteoporosis in 2010.[13] In the United States in 2010 about 8 million women and one to 2 million men had osteoporosis.[11][14] This places a large economic burden on the healthcare system due to costs of treatment, long-term disability, and loss of productivity in the working population. The EU spends 37 billion euros per year in healthcare costs related to osteoporosis, and the USA spends an estimated 19 billion USD annually for related healthcare costs.[118]


The link between age-related reductions in bone density and fracture risk goes back at least to Astley Cooper, and the term "osteoporosis" and recognition of its pathological appearance is generally attributed to the French pathologist Jean Lobstein.[122] The American endocrinologist Fuller Albright linked osteoporosis with the postmenopausal state.[123] Bisphosphonates were discovered in the 1960s.[124]

Anthropologists have studied skeletal remains that showed loss of bone density and associated structural changes that were linked to a chronic malnutrition in the agricultural area in which these individuals lived. "It follows that the skeletal deformation may be attributed to their heavy labor in agriculture as well as to their chronic malnutrition", causing the osteoporosis seen when radiographs of the remains were made.[125]

Osteoporosis means "porous bones", from Greek: οστούν/ostoun meaning "bone" and πόρος/poros meaning "pore".


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