ABSTRACT
Theca cell tumours are benign ovarian tumours. These tumours are of stromal origin. Most commonly they are seen in premenopausal and postmenopausal women. Usually they are asymptomatic and are found incidentally. Ovarian cancers can be of benign and malignant type. According to WHO classification, they are classified as epithelial, germ cell, sex cord stromal tumours and others.1 Among them epithelial ovarian cancer are most common, and the least common variety is of sex cord stromal tumours. About 1% of ovarian cancers are thecoma.2 These tumours are most commonly found in postmenopausal women however about 2% of stromal tumours occur in young girls.3 Theca cell tumours are also known as hormone producing tumours as they produce oestrogen hormone. Usually the patient presents with complaint of post-menopausal bleeding because of the oestrogen which is secreted by theca cell tumours. Imaging modalities (ultrasonography and CT scan) are of little help in differentiating thecoma from other types of ovarian tumours, because of radiological close resemblance to other tumours.4 Here we enlightened the symptomless presentation of such a huge thecoma which was diagnosed incidentally.