John H. Niffenegger

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Purpose To describe the clinical and histopathologic finding of very limited ophthalmic Wegener granulomatosis (WG). Methods Thirteen patients with scleritis, orbitopathy, episcleritis, and panuveitis were studied. They presented without evidence of lung or kidney disease, though eight had sinus involvement. We reviewed the biopsies for histopathologic(More)
A 50-year-old man presented with a rapidly growing mass in the area of the right lacrimal gland. An initial erroneous histopathologic diagnosis of a pleomorphic adenoma made on a small-incisional biopsy was later corrected to a malignant rhabdoid tumor when a wide local excision of the tumor was performed. The tumor was composed predominantly of(More)
We recorded full-field electroretinograms from 47 males and 26 obligate carrier females with choroideremia. All males had responses that were subnormal with delayed cone b-wave implicit times or undetectable. Only four of 26 females had abnormal electroretinographic responses but 25 of 26 were identified by ophthalmoscopy.
The respiratory activity of distinct populations of subsarcolemmal (SS) and interfibrillar (IF) skeletal muscle mitochondria was studied in rat hindlimb muscle subjected to 30 min of global ischemia at 37 C. State 3 (ADP-dependent) and state 4 (ADP-independent) rates of respiration were determined polarographically using glutamate as the substrate, in order(More)
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