Different clinocopathological presentations of steroid cell tumour - Report of three rare cases.

INTRODUCTION AND IMPORTANCE: We present three cases of steroid cell tumour due to their rarity, their differing clinical presentations and the distinct pathology. CASE PRESENTATION: Case 1: A 50-year-old female presented with heavy menstrual bleeding. Adenomyosis and multiple leiomyomata were found along with an incidental 2.5mm, paratubal steroid cell tumour. Given the size of the tumour and the histopathological features this was considered benign. Case 2: A 69-year-old female patient presented with virilization, found to have a left ovarian steroid cell tumour. Since there was capsular infiltration, close follow up was advised. Case 3: A 35-year-old female patient presenting with an acute abdomen due to torsion of a 15 cm right ovarian mass. The mass showed immunomorphological features of a steroid cell tumour. Since this tumour was large and had features of necrosis, high mitotic activity and nuclear pleomorphism, it was regarded as malignant. CLINICAL DISCUSSION: Steroid cell tumours of the ovary are rare (<0.1 % of all ovarian neoplasms) with uncertain malignant behaviour and are difficult to diagnose especially if classical virilising symptoms are absent. CONCLUSION: Thorough histopathological analysis and immunohistochemistry are essential in arriving at a definite diagnosis when the classical presentation is absent.