Faculty Bibliography

Pulmonary embolism (PE) and deep venous thrombosis (DVT) are a continuum and are difficult to diagnose clinically. Combined CT venography and pulmonary angiography (CTVPA) is a single examination that combines multidetector CT pulmonary angiography (CTPA) and CT venography (CTV) of the abdomen, pelvis, and lower extremities, providing "one-stop shopping" for venous thromboembolism without additional venipuncture or i.v. contrast, and it adds only a few additional minutes to scanning time. CTVPA rapidly and accurately examines the deep veins, reveals the presence, absence, and extent of deep venous thrombosis, serves as a baseline, and helps guide patient management. Multiple investigators have reported a high degree of accuracy when CTV is compared with venous ultrasound. There are some pitfalls in image interpretation, especially with regard to mixing artifacts, and there are continuing controversies as to exactly which parts of the abdomen, pelvis, and legs should be scanned routinely, the ideal timing of CTV acquisition relative to contrast injection, and the slice thickness and gap, if any, that should be used.

Bronchobiliary fistulas are rare, may result from infection with Echinococcus or Amebiasis, trauma, or hepatic malignancy, and present with biliptysis, the expectoration of bile. The authors present a 49-year-old woman who presented with frank biliptysis as a result of previously treated metastatic colon cancer to the liver. A hepatobiliary scan is the noninvasive diagnostic imaging test of choice for demonstration of such fistulas, and was useful in confirming the diagnosis in our patient.

We report the radiology and pathology of a pediatric patient with lymphomatoid granulomatosis (LG) and review the literature, with an emphasis on the radiological findings and on the small subset of pediatric patients with this rare condition.

The computed tomography (CT) findings of ovarian torsion in a 10-year-old girl are presented. The CT scan was the first cross-sectional imaging examination performed in this patient, who presented with suspected acute appendicitis. Analogous to the sonographic diagnosis of ovarian torsion, the imaging findings may be pathognomonic on CT and should be prospectively recognized for prompt diagnosis.

Oncocytoma is an uncommon benign, typically solitary renal tumor first reported in 1942. Renal oncocytomas are rarely multiple and/or bilateral. Accurate preoperative diagnosis and differentiation from renal carcinoma is difficult. We report the radiology and pathology of a patient with bilateral renal oncocytomas and review the literature of this rare presentation.

Adenocarcinoma of the stomach represents upwards of 95% of all gastric malignancy. Calcifications in untreated gastric cancer are rare, but typically represent mucin-producing tumor. We report the radiology and pathology of a patient who presented with gastric wall calcifications on CT and a mucin-producing adenocarcinoma at pathologic examination of a gastric biopsy specimen.