Search PubMed⌕ Search

Biomedical subjects

D C Levin

Publications and source records attributed to D C Levin.

At least 163 records · Page 9Linked to original sources
PubMed1977

Case report.

Explore the source record for details and available documents.

Adenoma↗
PubMed1976

Jugular venous ectasia in children. A report of 3 cases and review of the literature.

Three cases of jugular venous ectasia in children were diagnosed preoperatively by selective venography. These rare lesions appear to be congenital dilatations of the veins and should not properly be called aneurysms, as their histological structure is normal. A typical history and complex of physical findings are associated with this entity. It is important to include it in the differential diagnosis of neck masses in children.

Child↗
PubMed1976

Reticular neovascularity in malignant and inflammatory renal masses.

Experienced angiographers were asked to differentiate malignancy from inflammatory disease on arteriograms of 37 renal masses containing fine reticular neovascularity, as opposed to the coarser, more irregular vessels typical of hypernephroma. The rate of accuracy was only 58%. Distribution of vessels chiefly around the periphery of the mass was associated with a diagnosis of inflammatory disease in all 6 patients with this finding; this was the sole criterion which proved to be helpful in making the distinction. The authors feel that when arteriography reveals reticular neovascularity, differentiation between malignant and inflammatory renal masses may be difficult or impossible and that the term "tumor vascularity" should be avoided in such situations.

Diagnosis, Differential↗
PubMed1976

Arteriography of peripheral hemangiomas.

Arteriography has proved useful in evaluation of 17 patients with peripheral soft-tissue hemangiomas (15 benign, 2 malignant) by defining their extent, degree of vascularity, and source of vascular supply and allowing differentiation from arteriovenous malformations. In 11 cases (all benign), moderate fine-caliber hypervascularity with some degree of staining was seen. In 6 (4 benign, 2 malignant) there was marked hypervascularity with coarse, irregular vessels. The coarse or fine hypervascularity which characterizes most benign hemangiomas closely resembles that seen in malignant soft-tissue tumors and may preclude correct diagnosis by angiography alone. However, peripheral hemangiomas frequently exhibit distinctive clinical features which when combined with the arteriographic findings enable the radiologist to identify the lesion.

Adolescent↗
PubMed1976

Pleural fluid pH in parapneumonic effusions.

The pH and carbon dioxide tension were measured in 24 consecutive parapneumonic effusions, along with the leukocyte count, leukocytic differential count, and levels of glucose and protein. Three categories of parapneumonic effusions were characterized: (1) empyemas; (2) benign (nonloculated) effusions; and (3) loculated effusions. A pH greater than 7.30 was present in all ten benign effusions, and spontaneous resolution occurred in each case. All ten empyemas and the four loculated effusions had a pH less than 7.30. All four loculated effusions required drainage with a chest tube for resolution. The pH of the pleural fluid alone separated the empyemas and loculated effusions from benign effusions. The early separation of parapneumonic effusions on the basis of the pleural fluid appears useful. If the pH is greater than 7.30, a benign effusion is present, and spontaneous resolution is likely. If the pH is less than 7.30, loculation of the pleural space may occur regardless of whether the effusion fulfills the criteria for empyema.

Drainage↗
PubMed1976

Arteriography of retroperitoneal lymphoma.

Arteriography was performed in 16 patients with various types of lymphoma involving the retroperitoneal space. The location and extent of the mass could be predicted in 15 cases, based upon displacement of major arteris or kidneys. Most of the studies demonstrated some degree of fine reticular neovascularity and staining within the mass; none showed extreme hypervascularity, coarse or ragged vessels, or pooling of contrast medium during the capillary phase. The differential diagnosis of lesions with this appearance includes metastases, sarcomas, neural tumors, and inflammatory masses. Arteriography may possibly prove to be of value in staging certain patients with lymphoma, although definitive assessment of its role must await further prospective studies.

Adult↗
PubMed1976

Further observations on pulmonary venous varix.

Pulmonary venous varix is a well known radiographic entity. Case reports are presented to illustrate the following unusual aspects of this lesion. 1. Hypoplasia of a major pulmonary vein results in increased pulmonary blood flow through the remaining normal ipsilateral pulmonary vein. This may result in variceal enlargement of the normal vein. 2. A pulmonary venous varix may be visualized during angiocardiography but not in a routine chest radiograph. This is most common in children. 3. Elevated pulmonary venous pressure causes dilatation of the central pulmonary veins. Sudden formation of a pulmonary venous varix in a patient with mitral valvular disease may be evidence of a sudden elevation of left atrial pressure.

Adolescent↗
PubMed1976

Transbronchial lung biopsy via the fiberoptic bronchoscope in the diagnosis of diffuse pulmonary infiltrates in the immunosuppressed host.

The differential diagnosis of diffuse pulmonary infiltrates in the immunosuppressed patient is broad. Many of the etiologies are amenable to specific therapy. Although endobronchial brush biopsy has been used to identify many infections, including Pneumocystis carinii, it was less effective in the diagnosis of noinfectious infiltrates. Transbronchial lung biopsy via the fiberoptic bronchoscope provided lung tissue that could be studied histologically, which increased the diagnostic yield without the morbidity and mortality of open or percutaneous lung biopsies.-

Adolescent↗
PubMed1975

A computer program for calculation and interpretation of pulmonary function studies.

A computer program to calculate and interpret the standard pulmonary function tests has been developed on a programmable calculator system. The program computes both predicted and measured values for static and dynamic lung volumes, airways resistance and diffusing capacity. It then checks for differences between predicted and obtained values and interprets them according to a specific, clinically useful set of diagnostic criteria. By acquisition of a reliable and easy-to-use data processing system, a pulmonary function laboratory can significantly increase the efficiency and accuracy of its day-to-day work.

Computers↗