Differential Diagnosis
Endometrioid ovarian cancer may
arise from an atypical endometrioma. Distinguishing these two
pathologies on imaging may sometimes be challenging due to a number of
factors: the ovarian parenchyma adjacent to an endometriotic cyst can be
mistaken for an enhancing solid malignant nodule, deep invasive
endometriosis of the recto-sigmoid colon can mimic the “mushroom cap”
sign associated with invasive malignancy (30)