[Mild encephalitis/encephalopathy with a reversible splenial corpus callosum lesion (MERS)].

Introduction: Mild encephalitis/encephalopathy with a reversible isolated splenial corpus callosum lesion (MERS) is a clinical-radiological syndrome characterized by a lesion in the center of the splenium identified by magnetic resonance imaging (MRI), the imaging test of choice.

Case Report: A 31-year-old man is admitted with fever, intense hemicranial headache, disorientation, dysarthria and paresthesia in the lips and both upper extremities is presented; and that he is admitted for a suspected diagnosis of viral encephalitis. The cerebrospinal fluid analysis shows an elevation of proteins and the electroencephalogram shows generalized slowing, predominantly on the left.

[Juvenile nasal angiofibroma significant locoregional involvement].

Juvenile nasal angiofibroma is a benign tumor characterized by abundant vascularization and a tendency to hemorrhage. Despite its benign histology, it can present locally expensive growth that usually presents bone remodeling and the mass effect of adjacent stuctures. We present the case of a 15-year-old patient who came to the emergency department of our center for recurrent epistaxis.

[Bouveret syndrome: unusual cause of gallstone ileus].

Introduction: Bouveret syndrome consists of an obstruction of the gastric outlet due to the impaction of a gallstone in the duodenal bulb after migration through a cholecystoduodenal fistula.

Clinical Case: Patient with diffuse colicky abdominal pain, diarrhea and yellowish vomiting. The imaging tests carried out reveal significant gastric and duodenal dilation with the presence of gas at the gallbladder level with the existence of a cholecystoduodenal fistula with a rounded intraluminal image in the proximal jejunum compatible with migrated lithiasis.