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C Beinart

Publications and source records attributed to C Beinart.

12 recordsLinked to original sources
PubMed1995

A nested case-control study of mammographic patterns, breast volume, and breast cancer (New York City, NY, United States).

The relations of Wolfe mammographic patterns, quantitative mammographic densities, and mammographically estimated breast size to breast cancer risk were investigated prospectively in a case-control study nested in the New York University Women's Health Study, a cohort of 14,291 women in New York City, NY (United States). The archived mammograms of 197 breast cancer cases who were identified during the first 5.5 years of the study and of 521 individually matched controls from the same cohort were retrieved and classified according to Wolfe parenchymal patterns and mammographic densities by two expert radiologists. Breast size and volume were estimated on the mammogram's cranio-caudal projection. In both premenopausal and postmenopausal subjects, the risk of breast cancer increased progressively with increasing density and percent density area. A significantly increased risk was found also for Wolfe pattern DY in premenopausal women and P2 pattern in postmenopausal subjects. In premenopausal women, mammographically determined breast volume and breast height also were associated positively with breast cancer risk. Although the results of the present study confirmed that mammographic parenchymal patterns and densities were important predictors of breast cancer risk, their practical use in screening seems limited due to the high prevalence of high risk patterns.

Adult↗
PubMed1992

Reproducibility of Wolfe's classification of mammographic parenchymal patterns.

BACKGROUND: Inadequate reproducibility of Wolfe's classification of mammographic parenchymal patterns may explain its limited use in clinical and screening practice. If the misclassification of mammographic parenchymal pattern categories is substantial, inconsistencies in study results will occur, which could at least partially explain the frequent inability to replicate Wolfe's findings in studies of breast cancer. In this article, results of a study to determine whether consensus to resolve inconsistencies between raters would improve the level of concordance in mammographic parenchymal pattern categorization and thus help reduce misclassification are presented. METHODS. One hundred consecutive mammograms from a large screening clinic in New York City were classified independently by two expert mammographers on two separate occasions, 8 days apart. Coding was repeated in two consensus conferences several weeks later. Reliability was estimated by computing intraclass correlation coefficients. RESULTS: Initially, the average intraobserver reliability for the four patterns was 0.68 and the interobserver reliability was 0.65. After consensus, reliability improved markedly to 0.88. CONCLUSION: It is concluded that the added complication and cost of consensus ratings will be more than offset by a substantial increase in precision.

Adult↗
PubMed1983

Arterial spasm during renal angioplasty.

Spasm of the renal arteries during transluminal angioplasty is a well-documented phenomenon with serious potential sequelae, particularly in young patients with fibromuscular dysplasia. The authors report their experience in 98 cases (105 arteries). Tolazoline, lidocaine, nitrates (or calcium blockers, if available), and heparin should be administered either directly into the renal artery or systemically prior to angioplasty to decrease the incidence and severity of spasm.

Adolescent↗
PubMed1982

Percutaneous transluminal angioplasty of the popliteal artery and its branches.

Percutaneous transluminal angioplasty (PTA) of the popliteal artery and its branches was performed for relief of ischemia of the leg. Thirty-four procedures were performed in 31 patients (bilateral in 1 and repeated in 2). Angioplasty was technically successful in 29 cases (85%), with immediate clinical improvement in 26 (89%). The mean ankle-arm pressure index rose from 0.28 to 0.77. Long-term noninvasive follow-up in 23 of 26 patients with initial clinical improvement demonstrated reocclusion in 6 (2 of whom had successful redilatation) and continued patency in 13 who were followed up for 3 to 29 months (average, 11.6 mo.); the mean ankle-arm pressure index was 0.71 and the cumulative patency rate at 2 years was 57%. Six patients died, though all were asymptomatic. Since many of these procedures are performed for limb salvage in patients who would not benefit from surgery, PTA is useful in providing acute and often prolonged relief of ischaemia of the leg.

Aged↗
PubMedDate not supplied

Biliary pressure measurement: an aid in the management of patients on internal biliary drainage.

To aid in the management of patients with internal biliary drainage catheters, biliary pressure readings are routinely taken. If the pressure is below the secretory pressure of bile (20-30 cm H2O), adequate internal biliary drainage is assured. This is a fast, simple, and reliable technique which can be performed at home by the patient or a visiting nurse. The need to exchange a catheter can now be based on the objective measurement of the biliary pressure.

Aged↗
PubMedDate not supplied

Obstruction without dilation. Importance in evaluating jaundice.

Transhepatic cholangiography demonstrated no intrahepatic biliary duct dilation in 16 cases of surgical jaundice. The role of ultrasound, computed tomography, and transhepatic cholangiography in differentiating between surgical and medical jaundice is discussed in the light of these 16 cases. Nondilated ducts on ultrasound or computed tomography do not rule out surgical jaundice, and transhepatic cholangiography should be performed for complete evaluation of the biliary tree.

Adult↗