Radioisotope bone scans of the paediatric skeleton have been undertaken in the Departments of Radiology and Nuclear Medicine on a daily basis. Indications for bone scintigraphy include infection, trauma, primary benign bone tumours, as well as malignancy. Other conditions such as avascular necrosis and certain dysplasias also warrant a bone scan. When faced with a child who is symptomatic, but in whom the diagnosis is uncertain, eg. the child with a limp of backache, will require a bone sc...