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juvenile angiofibroma

Wednesday 8 September 2004

Juvenile nasopharyngeal angiofibroma (JNA) is a rare benign neoplasm of the nasopharynx that accounts for 0.5% of all head and neck tumors.

Although histologically benign in appearance, JNAs are locally aggressive and destructive, spreading from the nasal cavity to the nasopharynx, paranasal sinuses, and orbit skull base with intracranial extension.

The gender selectivity of JNA and the relatively young age at diagnosis suggest hormone-dependent development.

Hormonal disorders have been reported in patients with JNA, and androgen and estrogen receptors have been identified in tumor tissue; however, a hormonal influence on JNA is controversial.

Immunochemistry

- beta-catenin immunostaining (11238055)

Etiology

- frequent somatic mutations of CTNNB1 coding for beta-catenin (11238055)

Predisposition

- familial adenomatous polyposis (FAP - APC mutations) (18227724, 15951557)

Variants

- giant cell angiofibroma recurring as a solitary fibrous tumor (18645449)

References

- Coutinho-Camillo CM, Brentani MM, Nagai MA. Genetic alterations in juvenile nasopharyngeal angiofibromas. Head Neck. 2008 Mar;30(3):390-400. PMID: 18228521

- Valanzano R, Curia MC, Aceto G, Veschi S, De Lellis L, Catalano T, La Rocca G, Battista P, Cama A, Tonelli F, Mariani-Costantini R. Genetic evidence that juvenile nasopharyngeal angiofibroma is an integral FAP tumour. Gut. 2005 Jul;54(7):1046-7. PMID: 15951557

- Abraham SC, Montgomery EA, Giardiello FM, Wu TT. Frequent beta-catenin mutations in juvenile nasopharyngeal angiofibromas. Am J Pathol. 2001 Mar;158(3):1073-8. PMID: 11238055

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  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma
  • Juvenile angiofibroma (beta-catenine)
  • Juvenile angiofibroma (beta-catenine)
  • Juvenile angiofibroma (beta-catenine)
  • Juvenile angiofibroma (beta-catenine)
  • Juvenile angiofibroma (smooth muscle actin)