A rare case of plasma cell granuloma (PCG) of the brain is reported. A
n 18-year-old man with a well known homocystinuria and a history of se
vere oligophrenia, grand-mal-epilepsia, bilateral ectopia lentis requi
ring extraction of both lens and operatively corrected genu valgum, di
ed suddenly within a few minutes. In 1993 a hypergammaglobulinemia was
noticed and a decortication on the left side after purulent pneumonia
became necessary. Four months before death, multiple abscesses in the
spleen and pancreas led to splenectomy and resection of the pancreati
c tail. Autopsy revealed a pulmonary embolism and an isolated intracra
nial plasma cell granuloma of the left hemisphere.