Aportación de la resonancia magnética en el diagnóstico de la aciduria glutárica de tipo I / The contribution of magnetic resonance imaging to the diagnosis of type I glutaric aciduria

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Vena hemiácigos persistente y ausencia de vena cava inferior intrahepática. ¿Un hallazgo casual? / Persistent vena hemiazygos and absence of intrahepatic inferior vena cava. A casual finding?

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Pseudoaneurisma postinfarto del ventrículo izquierdo: hallazgos en resonancia magnética / Left vewntricule pseudoaneurysm following myocardial infarction: MRI findings

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Síndrome de Guillain-Barré: hallazgos por resonancia magnética en una presentación clínica atípica / Guillain-Barre syndrome: magnetic resonance findings in an atypical clinical presentation

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[Adrenal gland myelolipoma: radiological view]. / Mielolipoma suprarrenal: una visión radiológica.

OBJECTIVE: To report a case of adrenal myelolipoma in a female patient with a history of arterial hypertension and increased plasma aldosterone levels. METHODS: Evaluation by CT and ultrasound, and anatomopathological analysis were performed. RESULTS: The CT and ultrasound scans showed a fat-containing adrenal mass. The patient underwent surgery. Histological analysis of the surgical specimen demonstrated a myelolipoma, a benign tumor composed in varying proportions of adipose and hematopoietic tissue. CONCLUSIONS: A diagnosis of adrenal myelolipoma must be considered when a fat-containing adrenal mass is demonstrated by ultrasound, CT or MRI.

[Retroperitoneal ganglioneuroma in childhood]. / Ganglioneuroma retroperitoneal en la infancia.

OBJECTIVE: An incidentally discovered retroperitoneal ganglioneuroma in a 4-year-old child is presented. METHODS: Ultrasonography and CT were performed. The surgical specimen was analyzed by macroscopic, histological and immunohistochemical techniques. RESULTS: US and CT localized a retroperitoneal mass independent from the left kidney and adrenal gland. The histological study showed a fascicular proliferation with myxoid and fibrillar areas mixed with mature ganglion cells. These cells were positive for neurofilament and neuron specific enolase. The patient had a favorable outcome with no signs of tumor recurrence. CONCLUSIONS: Ganglioneuroma is a rare, completely mature tumor that has to be differentiated from neuroblastoma.

Invaginación ileocecal causada por un pólipo fibroide inflamatorio / Ileocecal intussusception caused by an inflammatory fibroid polyp

El pólipo fibroide inflamatorio es una lesión poco frecuente del tracto gastrointestinal caracterizada por una proliferación celular no neoplásica compuesta por fibroblastos, vasos sanguíneos y células inflamatorias en el seno de una estroma edematosa y colágena. Presentamos el caso de una mujer de 78 años de edad en la que la enfermedad se manifestó inicialmente con un cuadro de suboclusión intestinal. El estudio histológico puso de manifiesto una estructura polipoide constituida por una proliferación de vasos de variado tamaño, algunos congestivos, y de fibroblastos, que se disponían en áreas de forma concéntrica. La estroma se acompañaba de un intenso infiltrado inflamatorio con abundantes eosinófilos. El pólipo fibroide inflamatorio podría considerarse una lesión no neoplásica de carácter reactivo e inflamatorio, y explicarse como una cicatrización hipertrófica del tejido conectivo submucoso, a modo de queloide (AU)

[Adrenal oncocytoma]. / Oncocitoma suprarrenal.

OBJECTIVE: To describe an additional case of adrenocortical oncocytoma that had been incidentally discovered. METHODS/RESULTS: A case of adrenocortical oncocytoma in a 30-year-old male is presented. Patient evaluation by US, CT and arteriography revealed a well-defined mass between the upper pole of the left kidney, spleen and stomach, that appeared to be of adrenal origin. Histopathological and ultrastructural studies revealed a benign adrenocortical oncocytoma with moderate cell atypia but with no signs of infiltration. CONCLUSION: Adrenocortical oncocytoma must be included in the differential diagnosis of solid adrenal tumors.

[Cystic neuroblastoma: atypical presentation in newborns]. / Neuroblastoma quístico: una forma atípica de presentación en neonatos.

OBJECTIVE: Two cases of cystic neuroblastoma diagnosed by ultrasonography and CT are presented. METHODS/RESULTS: Case 1 was diagnosed by prenatal ultrasonography; case 2 was a palpable abdominal mass that was incidentally detected in a 15-day-old neonate. Both cases showed no analytical abnormalities. The histological analysis demonstrated a localized cystic neuroblastoma. CONCLUSIONS: Cystic neuroblastoma as an atypical form of neuroblastoma in neonates localized in the adrenal gland. It is usually an incidental finding, diagnosed by prenatal ultrasonography or as a palpable abdominal mass. This neoplasm is characterized by its cystic appearance, with no calcification inside and distant metastasis is rare. Prognosis is excellent if diagnosed and treated early. Ultrasonography is the method of choice for the diagnosis of an abdominal mass in neonates.

[Extramedullary anaplastic plasmacytoma]. / Plasmocitoma anaplásico extramedular.

A case of extramedullary plasmacytoma of the maxillary sinus, locally aggressive, in a 65 years old man is presented. Clinical diagnosis of adenocarcinoma was suspected but the pathological study showed an anaplastic morphology, with little plasmacytic differentiation and lack of stain with cytokeratins and epithelial membrane antigen (EMA), immunohistochemical marker of plasmatic cells, among others. Definitive diagnosis was based on light chain restriction and lack of multiple myeloma.