Objectives To describe histological, immunohistochemical and ultrastructural features of synovial biopsies of amyloid arthropathy associated with multiple myeloma (MM). Methods Synovial biopsies from affected joints of two patients with MM and amyloid arthropathy were examined with light and electron microscopy, and immunohistochemically for expression of CD3, CD8, CD20, CD38, CD68, Ki-67 and vWF. Results were compared to values from osteoarthritis ... Read more