Hak Soo Lee

Peritoneal lymphomatosis: CT findings

AbstractBackground: Diffuse peritoneal tumor infiltration is well recognized on computed tomography (CT) and is usually associated with carcinomatosis. The purpose of this investigation was to analyze the CT findings of peritoneal spread from primary gastrointestinal lymphomas. Methods: Abdominal CT scans in eight patients with peritoneal lymphomatosis were retrospectively reviewed. Patients were 12–75 years old (mean = 48 years); with six patients were male and two were female. Pathologic evidence of primary lymphoma was available by colonoscopic biopsy of the terminal ileum in seven cases and by gastroscopic biopsy of the stomach in one case. All patients had non-Hodgkins lymphoma. We analyzed CT findings in view of presence or loculation of ascites, abnormal patterns of mesentery and omentum, presence of peritoneal enhancement, presence of low attenuation and location of lymph nodes, and primary gastrointestinal lymphoma. Results: Although ascites was present in all patients, there was no loculation. The involvement of mesentery was present in seven patients, and the stellate pattern was the common type (4/7). The involvement of omentum was present in seven patients, and the common type was omental cake (3/7). Peritoneal enhancement was present in six patients. Enlarged lymph nodes were present in six patients, mainly at the retroperitoneum and mesentery, and showed centrally low attenuation in half the patients. Conclusion: Patterns of tumor involvement of mesentery, omentum, and peritoneum seen in peritoneal lymphomatosis are indistinguishable from those seen in peritoneal carcinomatosis or tuberculous peritonitis. However, ascites without any loculation or septation and diffuse distribution of enlarged lymph nodes were helpful signs of peritoneal lymphomatosis.

Radiologic Findings of Renal Hemangioma: Report of Three Cases

Renal hemangioma is an uncommon benign tumor which usually causes painless or painful gross hematuria. Its preoperative diagnosis is extremely difficult or even impossible. We experienced three cases of renal hemangioma, located mainly at the pelvocalyceal junction or in the inner medulla. US demonstrated variable echogenecity, and CT revealed a lack of significant enhancement. Where there is gross hematuria in a young adult, especially when the renal mass located in the pelvocalyceal junction or inner medulla shows little enhancement on CT, renal hemangioma should form part of the differential diagnosis.

Subcutaneous bronchogenic cyst: unusual unltrasonographic findings.

B cysts arise as developmental aberrations of the primitive foregut. They are commonly located in the lung or mediastinum, along the tracheobronchial tree, and rarely can appear in atypical locations, such as the neck, scapula, pericardium, and vertebral and subpleural areas. 1-9 Cervical and subcutaneous bronchogenic cysts are rare. 1-6 We recently encountered a subcutaneous bronchogenic cyst in the posterior triangle of the neck. On computed tomography (CT), the bronchogenic cyst appeared as a nonspecific cystic lesion in the subcutaneous fat layer. Ultrasonography showed a hypoechoic lesion with internal echogenic foci, suggesting a complicated cystic lesion. To our knowledge, the internal echogenic foci within the bronchogenic cyst shown on ultrasonography have not been described previously.

MR imaging of medullary streaks in osteosclerosis: a case report.

We present a case of medullary sclerosis of the appendicular skeleton in a patient with chronic renal insufficiency for whom MR imaging findings were characteristic. T1- and T2-weighted MR images showed multiple vertical lines (medullary streaks) of low signal intensity in the metaphyses and diaphyses of the distal femur and proximal tibia.