Microcystic Stromal Tumor of the Ovary With Mutation in Exon 3 of β-catenin. (March 2015)

• Record Type: Journal Article
• Authors: Kang, Yu Na; Cho, Chi Heum; Kwon, Sun Young
• Is Part Of: International journal of gynecological pathology. Volume 34:Number 2(2015:Mar.)
• Publication Date: 2015-03
• Subjects: Gynecologic pathology -- Periodicals; Gynecology -- Periodicals; Generative organs, Female -- Diseases -- Periodicals; 618.10705
• DOI: 10.1097/PGP.0000000000000122
• Languages: English
• ISSNs: 0277-1691

Abstract

<abstract> <title> <x xml:space="preserve">Abstract</x> </title> <sec> <p>Microcystic stromal tumor of the ovary is a very rare ovarian tumor with distinctive microcystic histologic features and a characteristic immunophenotype of stromal tumor. However, its origin, tumor pathogenesis, and prognosis have not been well established until now. We report a very unusual case of a microcystic stromal tumor of the ovary with a mutation in exon 3 of the <italic>β-catenin</italic> (<italic>CTNNB1</italic>) gene. Macroscopically, the fragmented ovarian tumor showed a diffuse solid mass. Microscopically, the tumor had a pathognomonic histologic pattern of solid and cellular areas with microcysts and fibrous hyalinized stroma. Immunohistochemical staining with CD10, vimentin, CD99, and β-catenin showed positive expression. However, α-inhibin and E-cadherin showed negativity. Mutational analysis revealed a point mutation in exon 3 of the β-catenin (<italic>CTNNB1</italic>) gene.</p> </sec> </abstract>