T Ghiasi, P Raofian, S Noruzpour,
Volume 11, Issue 4 (2-1998)
Abstract
Amyloidoma or amyloid tumor is a tumor-like localized deposit of amyloid
encountered occasionally in association with multiple myeloma, various chronic
inflammatory diseases and primary amyloidosis.
Amyloid tumors unassociated with plasmacytoma or other disease are
extremely rare in soft tissues and few cases in various situations have been
reported.
Histologic examination discloses amorphous eosinophilic material that stains
positive with congo red preparation, and shows apple-green birefringence under
polarized light. The deposits are surrounded by more or less prominent chronic
inflammatory cells, especially plasma cells and giant cells. Cartilage formation
and ossification, however, occur in some amyloid tumors.
