CT of the pelvic cavity, plain and post contrast – There was a large infiltrative ovoid soft tissue attenuating mass exhibiting non uniform contrast enhancement emerging from the right anal sac compatible with the known anal gland adenocarcinoma.
The right medial iliac and hypogastric lymph nodes showed mild enlargement. The short to long axis ratio (< 0.5) of the lymph nodes and their regular contrast enhancement pattern was preserved. There was a moderate degenerative lumbosacral stenosis with moderate disc protrusion and spondylosis deformans resulting in moderate narrowing of the vertebral canal and lumbosacral neuroforamina (L>>R). The Cauda equina nerve roots were displaced dorsally. Only a very thin layer of epidural fat signal was maintained outlining the dorsal aspect of the vertebral canal.
There was mid bilateral osteoarthritis of the hip joints as a sequel to mild hip dysplasia.
There were no bony changes compatible with metastatic spread.