Ovarian fibromas are benign tumors that consist of spindle cells in bundles or storiformly arranged with collagen fibers in the stroma. Thecomas resemble theca interna ovarian cells, and there is lipid material in their cytoplasm. There is an overlap in histological and immunohistochemical characteristics of these two benign tumors, and the term "fibrothecoma" was coined to describe such cases. Their incidence is extremely rare in adolescents. The subject of our study is a 15-year-old, unmarried, virgo intacta patient who was referred to us due to profuse vaginal bleeding and the loss of consciousness. A right ovary ultrasound examination exposed the formation of a hyperechoic tumor with a diameter of 41.2 mm × 29.5 mm. Findings of cancer antigen 125 (CA 125) in the amounts of 621.1 U/mL and 142.87 mIU/mL of the B-human chorionic gonadotropin (B-hCG) serum were determined. After preoperative preparation, we operated on the patient to remove a tumor with a diameter of 37 mm × 30 mm × 22 mm, smooth outer surface, solid cross-section, and yellowish white color. The diagnosis of fibrothecoma was made based on pathohistological examination. An unusual finding of fibrothecoma in a virgo intacta adolescent with profuse vaginal bleeding and increased levels of CA 125 and B-hCG may serve as a basis for broader thinking about the pathology of juvenile bleeding.
Keywords: adolescent; antigen CA 125; chorionic gonadotropin beta subunit; fibroma; human; thecoma; uterine hemorrhage.