History of rectal cancer presents for restaging status post chemotherapy. PELVIS:PROSTATE/SEMINAL VESICLES: Heterogeneously enlarged prostate gland.BLADDER: No significant abnormality noted.LYMPH NODES: The perirectal space lymph nodes are markedly decreased in size and restricted diffusion. The reference lymph node at the level of the rectosigmoid junction on the left measures 8 x 5 mm (series 4/13), compared to 1.4 x 0.9 cm previously.BOWEL, MESENTERY: The previously seen intermediate T2-weighted signal intensity solid rectal lesion has significantly decreased in size and is now predominantly markedly low signal intensity on T2-weighted imaging affecting the left posterolateral aspect of the rectum (series 4/40) likely reflecting post radiation scar tissue, measuring approximately 1.6 x 0.9 cm (series 4/40). Interval decrease in restricted diffusion associated with the rectal mass.BONES, SOFT TISSUES: Presacral soft tissue stranding and minimal fluid is likely treatment related.OTHER: No significant abnormality noted.
Interval marked decrease in rectal mass size and decrease in perirectal lymphadenopathy.