Epiploic appendicitis is an uncommon inflammatory condition, which is presently better diagnosed by current imaging methods such as computed tomography and ultrasonography that allow a non-invasive and efficient diagnostic approach. The authors studied 6 patients with epiploic appendicitis. The patients were submitted to computed tomography that showed paracolic oval lesions of 1 to 2 cm of diameter, fat attenuation and a thin peripheral hyperdense rim associated with adjacent fat stranding. Ultrasound examination performed in two patients showed hyperechoic ovoid noncompressible masses at the site of maximum abdominal tenderness.

Keywords: Epiploic appendicitis, Ultrasonography, Computed tomography

The authors report a case of a 49-year-old male patient with leiomyosarcoma of the ascending colon. The patient presented with anemia and an abdominal mass, and the symptoms progressed until a final diagnosis was made nine months later. A plain abdominal x-ray showed the presence of gas outside the bowel, in the right hypochondrium. The double contrast barium enema showed a sublevel displacement of the hepatic flexure and diverticula. An abdominal ultrasound revealed a heterogeneous expansive lesion below the liver containing gas, and a computed tomography of the abdomen revealed an excavated mass below the liver containing liquid, that was not filled in by contrast medium. The patient was submitted to a right hemicolectomy with ileocoloanastomosis and the histopathological analysis of the excised material revealed a leiomyosarcoma of the ascending colon.

Keywords: Leiomyosarcoma, Large bowel, Computed tomography

We reviewed 95 cases of patients with pituitary microadenomas diagnosed by magnetic resonance imaging in two institutions: "Hospital Santa Cruz/Beneficência Portuguesa de Niterói" and "Clínica X-Labs/Rio de Janeiro". Our aim was to establish the main type of pituitary microadenoma, incidence and proximity to the hypophisial stalk, and correlate these findings with clinical and laboratorial data. A Philips Gyroscan T5 III (0.5 Tesla), a GE Vectra (0.5 Tesla) and a GE Signa (1.0 Tesla) scanners were used to scan the patients with rapid sequences before and after intravenous administration of paramagnetic contrast medium (gadolinium). There was a predominance of women with prolactinomas associated to galactorrhea and hyperprolactinemia. In contrast to the current literature, we observed that the pituitary stalk was centered in most cases. Contrast medium injection immediately before scanning is essential to identify microadenomas. The use of half of the preconized dose of gadolinium is recommended.

Keywords: Pituitary microadenomas. Sellar tumors. Magnetic resonance imaging.

Magnetic resonance imaging plays a relevant role in the assessment of patients with pain on the dorsal aspect of the distal forearm and wrist. Among the causes of pain, intersection syndrome is highlighted, corresponding to an inflammatory process affecting the tendons of the second compartment of the forearm extensor (extensor carpi radialis brevis and extensor carpi radialis longus), usually caused by direct trauma or repetitive activities requiring wrist flexion and extension. The present essay is aimed at illustrating the typical findings in intersection syndrome of the forearm and discuss the main differential diagnoses.

Keywords: Forearm; Intersection; Magnetic resonance imaging; Extensor compartment