[Appendiceal mucocele. Apropos of 6 cases]. / Les mucoceèles appendiculaires. A propos de six cas.

Appendicular mucocele is a rare lesion presenting a combination of several histological lesions. It generally ruptures into the peritoneum and rarely into the retroperitoneum. The objective of this study was to examine the various radiological appearances of appendicular mucocele and to report three cases of mucocele which ruptured into the retroperitoneum. This retrospective series of 6 cases of histologically confirmed appendicular mucocele was collected by the Central Radiology Department of Ibn Rochd University Hospital in Casablanca. The mean age of the patients was 61.6 years (33 years-77 years) and the sex ratio was 4/2. A plain abdominal X-ray and ultrasonography were performed in all patients. Five patients were examined by CT scan and two underwent a barium enema. Five out of six mucoceles ruptured: into the peritoneal cavity in 2 cases with gelatinous ascites and into the retroperitoneum in 3 cases. The plain abdominal X-ray showed a mass in the right flank, which was calcified in 2 cases. Ultrasonography and CT scan were suggestive of the diagnosis of appendicular mucocele in only two cases. The case of non ruptured mucocele consisted of a clearly delimited, thin-walled collection. A loculated effusion with scalloping on the liver was observed in the two cases of gelatinous ascites. In the three cases of mucocele rupturing into the retroperitoneum, ultrasonography and CT scan showed a loculated retroperitoneal collection. This collection extended into the right psoas in 2 out of 3 cases. Gelatinous ascites is the usual complication of appendicular mucocele; but in rare cases of mucocele of a retrocaecal appendix, the mucus may enter the retroperitoneum.

[Contribution of imaging in malignant non-Hodgkin lymphomas of the small intestine. Apropos of 32 cases]. / Apport de l'imagerie dans les lymphomes malins non hodgkiniens du grêle. A propos de 32 cas.

The authors report a retrospective study concerning 32 cases of non Hodgkin lymphoma of the small intestine, histologically confirmed. All patients underwent digestive opacification. Ultrasonography was performed in 15 cases and CT scan was performed in 6 cases. The average age was 36 years and the sex-ratio was 3.4. The classical radiological signs described in the literature were found in our patients. The diagnosis of lymphoma was easily suggested in the presence of polymorphic and multifocal lesions, and especially the aneurysmal appearance. Abdominal sonography and computed tomography contributed to the diagnosis and also helped to relate an abdominal mass to its digestive origin, by showing a classical "sandwich" appearance.