Ovarian Sex Cord Stromal Tumors are a group of predominantly benign neoplasms that develop from the sex cord, stromal cells or both, the incidence of which is extremely rare. 1 Sclerosing stromal tumors are those that get up from mesenchymal cells in the ovarian stroma. More often in young women with non-specific symptoms, making diagnosis difficult, particularly in patients who do not undergo routine examinations. 1,2 Pelvic pain is one of the main reported symptoms that make it possible to continue an etiological investigation and imaging exams are essential for its assistance, with transvaginal ultrasonography and Magnetic Resonance Imaging (MRI) being the foremost propaedeutic methods established. Diagnosis with such tests will not always be sufficient to differentiate between benign and malignant findings, thus most often requiring surgical intervention. 3 The objective of this work is to report a case of this neoplasm and contribute to diagnostic and therapeutic improvement, since there are few publications on the subject