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Table 3 Classification of adnexal masses based on morphological appearance

From: MR imaging of ovarian masses: classification and differential diagnosis

Classification of adnexal masses basing on morphological appearance
Cystic unilocular (benign) non ovarian paraovarian cysts, hydrosalpinx, pyosalpinx and hematosalpinx
ovarian functional cysts and serous cystadenomas (common)
cystadenofibromas and mucinous cystadenomas (less common)
Cystic multilocular (benign and borderline) endometriomas, mucinous cystadenomas and borderline tumours (common)
serous cystadenomas (less common)
Cystic and solid (benign, borderline and malignant) benign mature cystic teratoma
borderline to malignant surface epithelial tumours, metastasis, Yolk sac, granulosa cell and Sertoli-Leydig tumours
Predominantly solid (benign, borderline and malignant) benign Brenner tumour, fibrothecomas
borderline to malignant serous and mucinous carcinomas, dysgerminoma and Yolk sac tumour, granulosa and Sertoli-Leydig cell tumours, metastasis