Mark S. Lifshitz

Congenital granular cell epulis: Immunohistochemical and ultrastructural observations

Tumor cells of the congenital granular cell epulis (GCE), unlike those of the granular cell tumor (GCT), did not stain with antiserum to S‐100 protein. Based on immunohistochemical findings it is concluded that the GCE and GCT differ in histogenesis; furthermore, ultrastructural studies of the authors are in agreement with others in supporting a mesenchymal origin of the GCE.

Laboratory equipment for the physician's office.

This article discusses the ideal requirements of office laboratory instruments and analyzes the various operating modes and types of reagents. General and specific features of chemistry and hematology analyzers are presented. Lastly, the financial decision-making process is outlined.