Light chain proximal tubulopathy is a paraproteinemic-related kidney disease most commonly seen in patients with a plasma cell dyscrasia. The classic description is that of proximal tubules with kappa-restricted intracytoplasmic crystals in a patient with a clinical Fanconi's syndrome. Recently, other variants of light chain proximal tubulopathy have been described including those without cryst...

This study investigated the ultrastructure and development of virus particles detected in a spontaneous mammary tumor of an 8 year old rhesus monkey. During a 3-month period of tumor growth, several biopsies were performed. Thin section electron microscopy of the tumor tissue revealed 2 types of particles: 1) an intracytoplasmic, electron-dense, ring-shaped particle, and 2) an extracellular ...