What are your top 3 differential diagnoses at this point?
1. Chondroblastoma/low grade chondrosarcoma 2. Intraosseous ganglion/subchondral cyst 3. Giant Cell Tumor
The lesion identified previously is lobulated with predominately iso to hypointense signal on T1, hyperintense on STIR, with surrounding bone marrow edema. Mild peripheral enhancement of the lesion is observed.
Incidentally, two adnexal cysts are identified on the left; a small simple cyst and a larger complex cyst. The larger cyst demonstrates a heterogeneous increased T1 and STIR signal with no evidence of enhancement.