Ultrasonographic evidence of a mushroom-shaped choroidal metastasis

PURPOSE: To describe the evolution of a "collar-button" or mushroom-shaped choroidal metastasis, METHODS: Case report RESULTS: A 52-year-old woman with known primary colon cancer and widespread extraocular metastases developed bilateral choroidal masses with neurosens ory retinal detachments. Clinical and ultrasound evaluation demonstrated ev olution of a choroidal metastasis with a "collar-button" configuration in t he right eye. CONCLUSION: A choroidal metastasis may develop a mushroom-shaped configurat ion. This "collar-button" configuration is not pathognomonic for choroidal melanoma, (C) 2000 by Elsevier Science Inc. All rights reserved.