Idiopathische sklerochoroidale Kalzifikation

Abstract

Background Idiopathic sclerochoroidal calcification (ISC) is an unusual, benign disorder occuring at the level of the posterior choroidea and sclera. Clinical differential diagnosis includes choroidal osteoma, choroidal metastasis, choroidal melanoma, choroidal amelanotic naevus and choroiditis. Patient A 61-year old man was referred with the diagnosis of multifocal choroidal tumor in both eyes. Fundoscopy showed bilateral yellow lesions located near the superotemporal arcade. Results Fluorescein angiography shows the late staining of the choroidal lesions. Ultrasonographically highly reflective lesions (sclerochoroidal placoid lesions at the sclero-choroidal interface in the CT) confirms the clinical diagnosis. The serum calcium and phosphate metabolism is normal. Conclusion The Idiopathic Sclerochoroidal Calcification (ISC) is a rare echographical differential diagnosis to the choroidal osteoma. ISC is a heterotopic calcification of the posterior pole in both eyes, usually located near the supero-temporal arcade.