Highlights Diaphragmatic clear cell carcinoma (CCC) from endometriosis is extremely rare. Diaphragmatic CCC from endometriosis shows cystic mass with solid component. MR and serial images are useful in the diagnosis of diaphragmatic CCCs.

Objective The aim of the study was to characterize magnetic resonance imaging findings in patients with recurrent ovarian adult granulosa cell tumors (AGCTs). Methods Clinical and magnetic resonance imaging manifestations of recurrent AGCTs were evaluated in 11 patients. Results Initial recurrences of AGCT were diagnosed between 13 months and 30 years (mean, 11.3 years). Recurrent tumors were located in the pelvic peritoneum, the abdominal peritoneum, the retroperitoneum, and bone. The number of recurrent tumors varied from 1 to 5. Tumors varied in morphology and all margins were well circumscribed. The internal structures noted were as follows: multilocular cystic and solid and cystic. Furthermore, internal hemorrhage and sponge-like multicystic components were identified. Conclusions Ovarian AGCTs recurred in the pelvic peritoneum, abdominal peritoneum, and the retroperitoneal lymph nodes. Large recurrent AGCTs were commonly well circumscribed, round or lobulated, and multilocular cystic or solid and cystic. Moreover, they frequently included internal hemorrhage and sponge-like multicystic components.

Background: On magnetic resonance cholangiopancreatography (MRCP) using a negative oral contrast agent, the gastric lumen appear dark, and gastric polypoid lesions can be seen. To our knowledge, there are no reports examining gastric polypoid lesions detected on MRCP.We exained the characteristics of gastric polypoid lesions detected on MRCP and discussed the management of the lesions.Material and Methods: MRCP images using a negative oral contrast agent were retrospectively evaluated in 1128 cases, and gastric polypoid lesions detected were investigated.Results: Gastric polypoid lesions were detected in 17 of the 1128 cases (1.5%) on MRCP. The mean patient age and gender were 66.7 years (range: 48-85 years) and 7 males / 10 females. A single lesion was detected in 4 cases, 2 to 4 lesions were detected in 6 cases, 5 to 10 lesions in 3 cases, and 11 or more in 4 cases. In 4 cases, the upper, middle, and lower portions of the stomach were occupied with polypoid lesions, in 4 cases, the upper and middle portions were occupied, in 1 case, the middle and lower portions were occupied, and in 8 cases, only the upper portion was occupied. One lesion was detected in 4 cases, 2 to 4 lesions were detected in 6 cases, 5 to 10 lesions in 3 cases, and 11 or more in 4 cases. The mean maximum diameter of the polypoid lesions was 7.8 mm (range: 4-16 mm). An upper endoscopy and forceps biopsy were performed in 9 of the 17 cases. The histological diagnosis was fundic gland polyps in 6 cases and hyperplastic polyps in 3 cases.Conclusion: Gastric polypoid lesions can rarely be detected on MRCP. The polypoid lesions were histologically fundic gland polyps or hyperplastic polyps. In the future, we will prospectively review more cases and examine indication of upper gastrointestinal endoscopy to gastric polypoid lesions detected on MRCP.