SCLEROSING STROMAL TUMOR OF THE OVARY

CASE REPORT OF A RARE OVARIAN TUMOR

Abstract

Sclerosing Stromal Tumors (SST) represent 2 to 6% of ovarian stromal tumors and more than 80% occur in young women, in the second or third decades of life. They are rare stromal sexual cord type tumors. They can manifest as menstrual abnormalities or abdominal discomfort, being rare hormonal manifestations. They are benign and unilateral in the majority. Macroscopically, the tumors are well defined, oscillating between 3 and 17 cm in diameter. The section is solid, grayish-white with occasional yellow spots and may contain cystic or edematous areas. In his histopathology, the tumor presents densely cellular, pseudolobular, poorly defined areas separated by a fibroedematous stroma. Mitotic activity is low. Dilated thin-walled vessels are typical. From an immunohistochemical point of view, there is expression of vimentin, alpha-inhibin, calretinin and CD34.