Objectives. To describe the sonographic characteristics of borderline ovarian tumor (BOT) recurrence. Methods. From the databases of five ultrasound centers, we retrospectively identified 68 patients with a histological diagnosis of recurrent BOT who had undergone pre-operative ultrasound examination. All recurrences were detected during planned follow-up ultrasound examinations. Recurrent lesions were described using the terms and definitions of the International Ovarian Tumor Analysis (IOTA) group. Results. Sixty-two patients had a serous BOT recurrence and six patients had a mucinous BOT recurrence. All patients except one were premenopausal, 84% of them being <40 years old. All but one patient were asymptomatic at the diagnosis of the recurrence. Fertility sparing surgery of the recurrent tumor was performed in 57/68 (84%) patients. The most frequent ultrasound feature of a recurrent serous BOT was unilocular-solid cyst (49/62, 79%), and almost half of the recurrent serous BOTs (29/62, 47%) had multiple papillary projections. In 89% of the recurrent serous BOTs there was at least one papillation with irregular surface and in 73% there was at least one papillation vascularized at color Doppler examination. Recurrent mucinous BOTs appeared mainly as multilocular or multilocular-solid cysts (83%, 5/6). Conclusions. Sonographic features of BOT recurrences resemble those described by others for different subtypes of primary BOT.
- tumor recurrence