Multiple calcifying aponeurotic fibroma: case report and review of the literature.

We describe the first case of diagnosis of generalized calcifying aponeurotic fibroma in 52 year-old man receiving long-term therapy for seronegative rheumatoid arthritis with rheumatoid nodules. The prevalence of lesions (presence of multiple subcutaneous nodules in the aponeuroses and fascia of the head, neck, trunk, upper and lower extremities with massive deposition of calcium salts), and a combination with monoclonal secretion (IgGκ serum, BJκ in the urine), raised inflammation markers, suggest that this case of the disease is unique, so both in domestic and foreign literature contains no description of this unusual course of this type of mesenchymal tumor. We have shown that subcutaneous nodules biopsy followed by morphological and immunohistochemical study is required in the diagnosis of the disease. We have given the literature data on the clinical manifestations, methods of diagnosis and differential diagnosis of this disease with a variety of pathologies, accompanied by the development of multiple calcification.