Osteomyelitis sclerosans Garré.

Osteomyelitis sclerosans Garré is still not completely understood. In spite of the fact that it is caused by bacterial infection, in most cases no bacterial growth can be discovered in culture. Furthermore, it remains open whether the chronic process is maintained by low-grade persistent infection or is maintained by itself after sterilization of the infection. Newer studies that may prove the presence of bacteria, e. g., by PCR, may elucidate the causes in the future. Sclerosing bone disease, sometimes multifocal, which present the same clinical, radiographic and histological features as chronic sclerosing osteomyelitis may be associated with diseases such as palmoplantar pustulosis, colitis ulcerosa, Crohn's disease, etc. and are reported as SAPHO (synovitis acne pustulosis hyperostosis osteitis) syndrome. In these diseases bacterial growth is almost always negative. However, temporary improvement under antibiotic therapy may be observed. A relationship between typical isolated chronic sclerosing osteomyelitis and SAPHO syndrome may exist, but the diseases should at present be differentiated. Neoplasms such as osteoid osteoma, Ewing sarcoma, or eosinophilic granuloma may simulate primary sclerosing osteomyelitis, and pathological examination of peripherally taken specimens may appear to be compatible with the diagnosis of sclerosing osteomyelitis. It should be appreciated that malignant tumors - even though this is the exception - can present a chronic, mild picture. Treatment of osteomyelitis sclerosans Garré needs be determined on an individual basis. A conservative approach with antibiotics usually leads only to temporary pain relief. The biopsy with opening of the medullary canal is sometimes sufficient for healing, while in extreme situations only segmental or even complete resection of the diseased bone case result in a permanent cure.