Resumo

BARRIOS BARRETO, Rina et al. Dermatofibrosarcoma protuberans with unusual presentation in vulva. Medicina (B. Aires) [online]. 2022, vol.82, n.3, pp.441-444. ISSN 0025-7680.

Gynecological sarcomas are uncommon and their location in the vulva and vagina has an incidence of 5% of all malignant neoplasms of the female genital tract. We present the case of a 54-year-old patient with a diagnosis of derma tofibrosarcoma protuberans in the vulva, an infrequent pathology, with less than 60 cases reported worldwide in this anatomical location. Clinically it has a locally aggressive behavior, due to the proliferation of spindle cells with pleomorphism and frequent figures of mitosis that infiltrate the reticular dermis and subcutaneous cellular tissue, giving rise to tumor lesions of variable size and with high rates of local recurrence. The treatment of first choice is surgical excision of the tumor with Mohs micrographic surgery or other surgical techniques for complete evalua tion of the circumferential and deep peripheral margin. However, the identification of carcinogenesis mechanis ms where the chromosomal translocation t (17; 22) (q22; q13) is recognized, forming the COL1A1-PDGFB fusion gene, which participates in stimulating tumor cell proliferation, allowing treatment with tyrosine kinase inhibitors such as imatinib for neoadjuvant therapy of surgically unresectable tumors and local recurrences.

Palavras-chave : Dermatofibrosarcoma; Vulva; Platelet-derived growth factor b; Collagen type I alpha1 chain.

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