David M Ayoub

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The dynamic signal intensity changes at magnetic resonance (MR) imaging in active and chronic wallerian degeneration in the corticospinal tract were evaluated. Forty-three patients with wallerian degeneration seen on MR images after cerebral infarction were studied. When possible, patients with acute stroke were examined with MR imaging prospectively at the(More)
BACKGROUND & AIMS We wished to review all published reports of congenital rickets to identify the causes and characteristics. METHODS 25 cases were identified in 19 published reports in which there was radiological and/or histological evidence of rickets in the first two weeks after birth. Cases of rickets associated with maternal renal failure were(More)
The frequency of multiple birth pregnancies, mostly twin pregnancies, was overrepresented in four different groups of young infants with fractures and bone abnormalities. This finding suggests that fetal bone loading through fetal movement is an important determinant of fetal bone formation and its resultant bone strength. It has been suggested that(More)
PURPOSE To determine the success and safety of percutaneous transhepatic liver biopsy with tract embolization (PBTE) in patients at risk for standard transhepatic biopsy. MATERIALS AND METHODS Eighty biopsies were performed in 76 patients with diffuse liver disease: 57 biopsies in patients with coagulopathy (11 of whom also had ascites), 16 in patients(More)
Quantitative analysis of Golgi-stained neurons in the preoptic area of the brain of prepuberal Macaca fascicularis monkeys indicated structural differences between males and females. Neurons of males had more dendritic bifurcations and a higher frequency of spines. The bifurcation difference appeared in all cell types and was concentrated in the(More)
To the Editor, I congratulate Dr. Cohen and colleagues for reporting on the histopathologic evidence of rickets in deceased infants and children [1]. I would like the opportunity to highlight some of the relevant findings from their study's data. The histologie features of rickets in deceased infants in the 1 st year of life were alarmingly high ( 13 of 15,(More)