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Biomedical subjects

W H Knapper

Publications and source records attributed to W H Knapper.

25 records · Page 2Linked to original sources
PubMedDate not supplied

Management of occult breast cancer presenting as an axillary metastasis.

The presentation of cancer in an axillary lymph node without an obvious primary site is a diagnostic challenge. This is particularly true in female patients. A diagnosis of metastatic adenocarcinoma consistent with occult breast primary requires further prompt therapy.

Adenocarcinoma↗
PubMedDate not supplied

Case report: Antemortem diagnosis of central nervous system strongyloidiasis.

Strongyloidiasis is usually a benign illness confined to the gastrointestinal tract. However, dissemination (hyperinfection syndrome) may occur, particularly in patients with impaired cell-mediated immunity. The diagnosis of hyperinfection syndrome is often made postmortem, and mortality is high, even when the disease is recognized during life. Central nervous system involvement with Strongyloides stercoralis has previously been recognized in only a few cases at postmortem examination, and in one case antemortem. We describe a patient with disseminated strongyloidiasis in whom central nervous system involvement was diagnosed antemortem. This patient developed multiple bacterial and fungal systemic and central nervous system infections as a complication of disseminated strongyloidiasis. The natural history of the disease in man, factors predisposing to dissemination, immunologic aspects of helminthic infection, and treatment modalities are discussed.

Animals↗
PubMedDate not supplied

Calibration methods for measuring splenic sequestration by external scanning.

Conventional methods for measuring splenic sequestration of labeled cells rely on stationary probe counting over the liver and spleen. A quantitative spleen-scanning method is proposed as a means of performing a more accurate diagnosis of the degree of splenic sequestration. Improved methods for calibrating a rectilinear scanner employing "constant resolutions" collimators, designed for the in vivo measurement, are reported, Clinical evaluation of this method was performed by scanning several patients scheduled for splenectomy. Good correlation between in vivo and in vitro measurements of splenic radioactivity for 29 patients was obtained. A least-squares fit to the data yielded a coefficient of determination r2=0.93.

Chromium Radioisotopes↗