CT imaging spectrum of infiltrative renal diseases.

Most renal lesions replace the renal parenchyma as a focal space-occupying mass with borders distinguishing the mass from normal parenchyma. However, some renal lesions exhibit interstitial infiltration-a process that permeates the renal parenchyma by using the normal renal architecture for growth. These infiltrative lesions frequently show nonspecific patterns that lead to little or no contour deformity and have ill-defined borders on CT, making detection and diagnosis challenging.

Delayed Splenic Rupture; Normal Appearing Spleen on the Initial Multidetector Computed Tomography (MDCT) Can Sometimes Be Misleading.

Introduction: Delayed splenic rupture (DSR) is an unusual outcome following blunt abdominal trauma. Although DSR is defined as bleeding more than 48 hours after blunt trauma in a previously hemodynamically stable patient, a review of the reported cases in the literature shows that in almost all of the cases the initial CT imaging revealed some form of damage to the spleen.

Case Presentation: Here we describe an extremely rare condition in a case that presented with a DSR following blunt trauma and had a normal appearing spleen in the initial post trauma MDCT scan.

The gamut of primary retroperitoneal masses: multimodality evaluation with pathologic correlation.

The retroperitoneum is a large space where primary and metastatic tumors grow silently before clinical signs appear. Neoplastic retroperitoneal diseases may be solid or cystic, primary or secondary and range from benign to aggressive in behavior. Retroperitoneal neoplasms are notable for their widely disparate histologies.

Atypical hemorrhagic presentation of a fourth ventricle subependymoma: case report.

Objective: To present a case of a fourth ventricle subependymoma (SE) with a spontaneous acute subarachnoid intra-cisternal bleeding.

Methods: A 33-year-old man was admitted with 5 days history of oppressive occipital headache and neck pain without additional neurological focus. Unenhanced computed tomography (CT) scan demonstrated an isointense mass located in the fourth ventricle with a spontaneously hyperdense acute extratumoral hemorrhage in the cisterna magna.

Restricted diffusion in a ring-enhancing mucoid metastasis with histological confirmation: case report.

We present a case of restricted diffusion in a ring-enhancing cerebellar metastasis in a 58-year-old man. Diffusion imaging showed restriction with low apparent diffusion coefficient values within the cavity. Diagnosis of abscess was suggested based on radiological findings.