Figure 5.
A 46-year-old female with a painful mass in her left buttock, which was confirmed histopathologically to be a monodermal teratoma. (a) Axial T2 weighted MR image showing a well-circumscribed ovoid mass arising from the left ischiorectal fossa (large arrowhead), separate from the uterus and ovaries and extending into the left hemipelvis. The rectum is displaced to the right (black arrow). The lesion contains complex myxoid and fluid morphology (white arrow) with small areas of inhomogeneity (small arrowhead). (b) Coronal T1 weighted MR image showing the low signal of the cystic mass (arrow).