An unusual case of osteomyelitis of IV metacarpus mimicking osteosarcoma

The differential diagnosis of osteolytic lesions is very difficult because it is to be distinguish among tumoral masses, infective lesions and metabolic diseases that might have a similar imaging. To allow a correct therapy is often necessary to perform biopsy, histopathology and infectious test. We report an unusual case of non-specific osteomyelitis where all clinical and radiological aspects suggested a diagnosis of osteosarcoma.