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Biomedical subjects

P Stark

Publications and source records attributed to P Stark.

229 records · Page 13Linked to original sources
PubMedDate not supplied

Right subclavian artery aneurysms--role of CT.

Three patients with right subclavian artery aneurysms are presented. CT can be useful in making the diagnosis. It depicts the relationship of the aneurysm to the surrounding anatomical structures and displays intraluminal thrombotic material.

Adult↗
PubMedDate not supplied

Bronchiolitis obliterans on high-resolution CT: a pattern of mosaic oligemia.

OBJECTIVE: Bronchiolitis obliterans, when not associated with organizing intraalveolar pneumonia or extensive peribronchiolar fibrosis, is often difficult to distinguish clinically and radiographically from other forms of chronic obstructive pulmonary disease. The aim of this study was to demonstrate a pattern on high-resolution CT (HRCT) that could suggest this diagnosis. MATERIALS AND METHODS: Two patients with a clinical diagnosis of bronchiolitis obliterans, moderate-to-severe obstruction on pulmonary function tests, and normal chest radiography were studied with HRCT. RESULTS: High-resolution CT of the patients with chronic bronchiolitis demonstrated a mosaic pattern of low attenuation probably corresponding to secondary lobules. CONCLUSION: We conclude that the low attenuation areas represent either air trapping or hypoxic vasoconstriction in secondary pulmonary lobules from obstruction of small airways. This pattern of mosaic oligemia was, until recently, only recognized with occlusive vascular disease and may suggest obstructive disease in the small airways.

Adult↗
PubMedDate not supplied

Esophageal wall thickening: a CT finding in diffuse esophageal spasm.

We report three patients with esophageal wall thickening, incidentally found at CT, in whom further evaluation led to the diagnosis of diffuse esophageal spasm (DES). All cases showed smooth, symmetric, circumferential wall thickening of the distal two-thirds of the esophagus with normal periesophageal fat. No lung parenchymal abnormalities suggestive of aspiration were seen. DES, although uncommon, is another benign condition that should be included in the differential diagnosis of esophageal wall thickening detected by CT.

Aged↗
PubMedDate not supplied

Pulmonary parenchymal manifestations of mitral valve disease.

Pulmonary parenchymal manifestations of mitral valve disease are the result of either pulmonary venous hypertension in mitral stenosis or abnormal regurgitant flow into pulmonary veins in mitral insufficiency. Typical radiographic findings in mitral stenosis include pulmonary vascular cephalization; interstitial, perivascular, and occasionally alveolar pulmonary edema; diffuse alveolar hemorrhage; hemosiderosis; and pulmonary ossification. Signs of interstitial pulmonary edema are frequently visible and include septal lines. Radiographic findings in diffuse alveolar hemorrhage consist of diffuse, confluent acinar or ground-glass areas of increased opacity, often sparing the peripheral parenchyma and creating the so-called window frame effect. Hemosiderosis is characterized by small, ill-defined nodules or by coarse reticular areas of increased opacity with a bias for the middle and lower lung regions. Ossification manifests as densely calcified, 1-5-mm nodules, mainly in the middle and lower lungs, with a tendency for confluence and the occasional presence of trabeculae. Imaging findings in mitral regurgitation depend on the acuteness of the disease. The most common parenchymal manifestations of acute mitral regurgitation are symmetric alveolar and interstitial pulmonary edema with indistinct, engorged pulmonary vessels and cephalized blood flow. Familiarity with these manifestations can expedite diagnosis, particularly in rare cases of unsuspected mitral valve disease.

Humans↗