New diagnosed rectal cancer seen on colonoscopy. PELVIS:UTERUS, ADNEXA: The enhancing tumor invades the uterine body.BLADDER: No significant abnormality noted.LYMPH NODES: No significant abnormality noted.BOWEL, MESENTERY: There is an annular mass lesion resulting in a focal stricture of the rectum with heaped up shouldering margins of the mid to upper rectum extending approximately 8 cm in length as delineated by the diffusion-weighted images (series 1005 image 360 through 252). Proximally the lesion likely extends into the distal sigmoid. The lesion measures up to 3.9 x 2.4 cm in maximal cross section (series 1000 5/276). The lesion demonstrates peripheral enhancement. The most distal aspect of the mass lesion is approximately 7 to 8 cm from the anal verge (series 701/25).Dorsally the lesion does not abut the presacral space. Ventrally the enhancing lesion invades the uterine body (series 701/25).At the level of the stricture there are strands of low T2-weighted signal intensity extending into the mesorectal fat (series 901/45). There are scattered small lymph nodes within the mesorectal fat (series 1101/44) at the 5:00 position and (series 1101/49) at the 10:00 position. Additionally there is a prominent lymph node in the ischiorectal space (series 1101/44) at the 9:00 position measuring 6 x 5 mm.Limited evaluation of the more proximal sigmoid colon demonstrates diverticulosis with moderate wall thickening which may be secondary to obstruction or chronic diverticular disease/muscular hypertrophy.In the region of the left adnexa there are small cystic components which may represent adnexal cysts versus a focal fluid collection related to a contained perforation. BONES, SOFT TISSUES: Patchy red marrow throughout the visualized osseous structures.OTHER: No significant abnormality noted.
Annular mass extending from the mid rectum to the most distal sigmoid colon with invasion of the uterus. Suspicious mesorectal and pelvic lymphadenopathy. Proximally the colon is not distended but demonstrates diffuse wall thickening which may be secondary to chronic obstruction versus muscular hypertrophy from chronic diverticular disease. Left adnexal fluid collection may represent adnexal cysts versus a focal fluid collection related to a contained perforation.