[Idiopathic inflammatory pseudotumor of the orbit in childhood. II. Biopsy].

Idiopathic inflammatory pseudotumour of the orbit was observed in three children in the age of 5, 8 and 9 years. It was characterized by mixed inflammatory cellularity with prevailing lymphocytes and eosinophilic leucocytes. Cellularity was often perivascular, a concentric lamellar perivascular fibrosis occurred later. Minute necroses of adipose tissue were found in two cases resulting in giant-cell lipogranuloma. Tumorous symptoms receded promptly after administration of corticoids in all cases.