Case HistoryA 64-year-old man presenting with lower abdominal pain was admitted to our hospital. He had a history of herniorrhaphy for right inguinal hernia 20 years earlier. All laboratory results were within normal limits. Contrast-enhanced computed tomography (CT) was performed for evaluation of abdominal pain, and CT scanogram (Figure 1) showed dilated small bowel loops (open arrows). Axial CT images (Figure 2) demonstrated a U-shaped, fluid-filled bowel loop (arrow) that pressed the urinary bladder (white star), and the proximal small bowel loops (open arrows) were dilated. Coronal reformatted CT images (Figure 3A and 3B) identified two transition points (open arrowheads) of the pseudo-encapsulated small bowel loop (arrow) above the urinary bladder (white star). On sagittal reformatted CT image (Figure 3C), an incarcerated bowel loop (arrow) compressed the anterior wall of the urinary bladder (white star). The patient underwent surgery and was diagnosed with intestinal obstruction caused by internal supravesical hernia (SVH). Teaching Point:The typical CT finding of internal supravesical hernia is a herniated and dilated bowel loop beneath a compressed urinary bladder.

Breast cancer is one of the most common cancers and causes several complications in females. Currently, MRI is a necessary method for preoperative studies in patients with breast cancer. A high frequency of breast MRI can lead to an increase in the number of incidental extramammary findings. Moreover, it can provide accurate preoperative workup; therefore, the prognosis of patients can be improved. Herein, we provide several extramammary findings, including the mediastinum, lung, upper abdomen, bone, and soft tissue, correlating with US, chest CT, liver MRI, PET-CT, and bone scan.

Main teaching point: Mucinous rectal adenocarcinoma typically shows high signal intensity on T2-weighted images, weak enhancement, and internal calcification.

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The authors reviewed the CT findings of 31 cased of primary retroperitoneal tumors confirmed by operation(25 cases) or needle biopsy(6 cases) at the Chonnam University Hospital from J une, 1983 to August, 1988. The size, shape, location, margin of mass, effect on the surrounding structures, presence or absence of metastasis and the composition of th e tumor were analyzed to find the differential points between benign and malignant tumors and characteristic findings of each tumorsThe results were as follows; 1. The benign tumor showed smaller size than malignant one and well circumscribed round or 。void lesions,and no surrounding invasion or distant metastasis 25. Santos L A, Ginaldis, Wallace S: Computed tomography in liposarcoma, Can cer 47:46, 1981 26 천혜정， 임진우， 최재결， 차안호， 서원혁 : 후복막에 생긴 지방육종의 전산화단충촬영소견， 대한방사선의 학회지 23 : 247 , 1987 27. Waligore M P , Stemphens D H, Soule E H, Lipomatous tumors of the abdominal cavity; CT appearance and pathologic correlations, AJR 137:539, 1981 28. Friedmann A C, Hartman D S , Sherman ], Lautin E