Abstract 1. 1. Three cases of osseous lesions in the orearm with the contending diagnostic problems of tuberculosis, metastatic thyroid and gumma have been presented. 2. 2. The eventual management and treatment have been outlined with results obtained. 3. 3. Emphasis is placed on the importance of x-ray, history and accurate observations in attempting a clinical diagnosis. 4. 4. Although the x-ray is no doubt our best clinical diagnostic aid, yet bony lesions may present unusual configurations which may be misleading to the best roentgenologists.