|Classification and external resources|
Bannayan–Riley–Ruvalcaba syndrome (BRRS) is a rare overgrowth syndrome and hamartomatous disorder with occurrence of multiple subcutaneous lipomas, macrocephaly and hemangiomas. The disease is inherited in an autosomal dominant form, but sporadic cases have been reported. The disease belongs to a family of hamartomatous polyposis syndromes, which also includes Peutz–Jeghers syndrome, juvenile polyposis and Cowden syndrome. Mutation of the PTEN gene underlies this syndrome, as well as Cowden syndrome, Proteus syndrome, and Proteus-like syndrome. Collectively, these four syndromes are referred to as PTEN Hamartoma-Tumor Syndromes (PHTS).
Signs and symptoms
Bannayan–Riley–Ruvalcaba syndrome is characterized by an enlarged head, pigmented maculae of the glans penis, and benign mesodermal hamartomas (primarily subcutaneous and visceral lipomas, multiple hemangiomas, and intestinal polyps). Dysmorphy as well as delayed neuropsychomotor development can also be present.
Up to 30% of the patients have thyroid involvement consistent with multinodular goiter, thyroid adenoma, differentiated non-medullary thyroid cancer, or Hashimoto's thyroiditis. Most lesions are slowly growing and easily resectable. Visceral as well as intracranial involvement may occur in rare cases, and can cause bleeding and symptomatic mechanical compression, especially of the spinal cord or spinal nerve roots. This may require surgical resection.
The syndrome combines Bannayan–Zonana syndrome, Riley–Smith syndrome, and Ruvalcaba–Myhre–Smith syndrome. Bannayan–Zonana syndrome is named for George A. Bannayan and Jonathan Zonana. Riley–Smith syndrome was named for Harris D. Riley, Jr. and William R. Smith. Ruvalcaba–Myhre–Smith syndrome is named for S. Myhre, Rogelio H. A. Ruvalcaba and David Weyhe Smith.
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- Gujrati M, Thomas C, Zelby A, Jensen E, Lee JM (August 1998). "Bannayan–Zonana syndrome: a rare autosomal dominant syndrome with multiple lipomas and hemangiomas: a case report and review of literature". Surg Neurol. 50 (2): 164–8. doi:10.1016/S0090-3019(98)00039-1. PMID 9701122.
- Hannigan, Steve, ed. (2007). Inherited Metabolic Diseases: A Guide to 100 Conditions. Radcliffe Publishing. p. 101. ISBN 1-84619-099-1.
- synd/1276 at Who Named It?
- Bannayan GA (July 1971). "Lipomatosis, angiomatosis, and macrencephalia. A previously undescribed congenital syndrome". Arch Pathol. 92 (1): 1–5. PMID 5091590.
- Zonana J, Rimoin DL, Davis DC (October 1976). "Macrocephaly with multiple lipomas and hemangiomas". J. Pediatr. 89 (4): 600–3. doi:10.1016/S0022-3476(76)80397-6. PMID 957004.
- synd/1731 at Who Named It?
- synd/1275 at Who Named It?