[Abrikosov's tumor]

Histologic and ultrastructural features of 11 Abrikosov's tumors located in various sites are described. They all had similar structures and comprised tumor cells of two kinds, polygonal and spindle-shaped. Both contained dark as well as clear cells that differed in the composition and number of cytoplasmic inclusion bodies and glycogen granules. Three types of specific cytoplasmic bodies were identified. Type 1 bodies had a peculiar shape resembling a tennis racket; type 2 were round, tended to fuse with one another, were intimately linked up with the endoplasmic reticulum, and bore structural similarity to Berbek's granules in Langerhans cells; while type 3 bodies were larger than the other types and ellipsoid in shape. The authors suggest on the basis of their findings that Abrikosov's tumor cells are related histogenetically to Langerhans cells.