Unsuspected "isolated" dislocation of the radial head in an adult.

We have described a patient who as a child sustained a Monteggia's fracture that was neither diagnosed nor treated. Neurologic deficit and limitation of motion were clinically apparent. A high index of suspicion, careful examination of the patient, and high-quality roentgenograms should enable accurate diagnosis of this and similar lesions in less obvious cases, thus avoiding the complications of missed diagnosis.

Intrahepatic gallbladder.

Intrahepatic gallbladder must be distinguished from other lesions which also produce an area of decreased tracer concentration on liver scan. Identification is imperative because it determines therapy. A scan performed with rose bengal labeled with iodine 131 was used in this case.

Traumatic diaphragmatic hernia into the pericardium: verification of diagnosis by computed tomography.

Computed tomography (CT) is a useful modality in the evaluation of mediastinal abnormalities and in the assessment of mediastinal masses for fat content. A case of posttraumatic herniation of the omentum and large bowel into the pericardial sac is presented. The mediastinal configuration, depicted on a CT scan, is thought to be diagnostic of this extremely rare abnormality.