[Extraskeletal uptake in bone scintigraphy]

Interpretation of a bone scan requires perfect knowledge not only of normal appearances and of the various methods of expression of bony lesions but also of normal or pathological extra-skeletal uptakes which can : (1) be a source of interpretation owing to their superposition with a bony segment. (2) provide useful further information directly linked to the bony disorder studied. (3) permits the unexpected discovery of lesions of the soft tissues. A careful clinical examination of the patient, and knowledge of the whole of the history permits one to explain most of the scanning abnormalities observed.