X-RAY MORPHOLOGY OF EOSINOPHILIC GRANULOMA OTHER THAN SKULL AND SPINE

The radiological findings in 39 patients with a manifestation of eosin ophilic granuloma (e.g.) other than skull and spine were evaluated. Th e localisation was found in the femur (26 %), clavicula (20 %) and rib s (20% ). The lesions were located in 81% in the diaphysis and in 9.5 % either in the epi-metaphysis or epi-metadiaphysis. Associated perios teal reactions were observed in 38 % of the patients, and were solid i n 25 %, lamellar in 10 %, and in 3 % complex. The majority of the tumo urs were classified as Lodwick IB lesions (41 %). Lodwick IC lesions w ere seen in 13 %, Lodwick II lesions in 25.5 % and Lodwick III lesions in 20.5 % of the patients. In patients below the age of 20 years the eosinophilic granuloma is characterised by a Lodwick IB lesion without or with a solid periosteal reaction, which allows differentiation fro m Ewing's sarcoma or osteomyelitis. Contrariwise, in patients above 20 years of age the e. g. appears with a higher Lodwick grade. Hence, di fferentiation, X-ray morphology, between e.g., metastasis, lymphoma, a nd multiple myeloma does not seem possible.