1. Genetic Profiling of Sebaceous Carcinoma Arising from an Ovarian Mature Teratoma: A Case Report.
- Author
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Zaitsu S, Aoyagi Y, Nishida H, Nakamura K, Yano M, and Kobayashi E
- Subjects
- Humans, Female, Adult, Class Ia Phosphatidylinositol 3-Kinase genetics, Adenocarcinoma, Sebaceous genetics, Adenocarcinoma, Sebaceous pathology, Polymorphism, Single Nucleotide, Cell Transformation, Neoplastic genetics, Ovarian Neoplasms genetics, Ovarian Neoplasms pathology, Ovarian Neoplasms surgery, Teratoma genetics, Teratoma pathology, Tumor Suppressor Protein p53 genetics
- Abstract
Ovarian mature teratomas (OMTs) originate from post-meiotic germ cells. Malignant transformation occurs in approximately 1-2% of OMTs; however, sebaceous carcinoma arising from OMTs is rare. This is the first report of a detailed genomic analysis of sebaceous carcinoma arising from an OMT. A 36-year-old woman underwent evaluation for abdominal tumors and subsequent hysterectomy and salpingo-oophorectomy. Pathologically, a diagnosis of stage IA sebaceous carcinoma arising from an OMT was established. Eight months post-surgery, the patient was alive without recurrence. Immunohistochemically, the tumor was negative for mismatch repair proteins. A nonsense mutation in TP53 (p.R306*) and a deletion in PIK3R1 were identified. Single nucleotide polymorphisms across all chromosomes displayed a high degree of homozygosity, suggestive of uniparental disomy. Herein, the OMT resulting from the endoreduplication of oocytes underwent a malignant transformation to sebaceous carcinoma via TP53 as an early event and PIK3R1 as a late event.
- Published
- 2024
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