... factor, anti-RNP antibody, and anti-SS -A antibody Bilateral hand X-rays showed mild swelling and destruction of the metacarpo-phalangeal (MP) and proximal-inter-phalangeal (PIP) joints He was diagnosed ... Hoshida Y, Xu JX, Fujita S, Nakamichi I, Ikeda J, Tomita Y, Nakatsuka S, Tamaru J, Iizuka A, Takeuchi T, Aozasa K: Lymphoproliferative disorders in rheumatoid arthritis: clinicopathological analysis ... Hematoxylin and eosin (HE) staining and immunohistochemistry analyses of bone marrow (BM), spleen, and lymph nodes Hematoxylin and eosin (HE) staining and immunohistochemistry analyses of bone marrow...