Masson's Lesion - A very rare cardiac mass.

Abstract Masson’s lesion is a rare type of vascular tumor usually found in the skin and soft tissues. Histological examination remains the gold-standard for diagnosis. Treatment involves complete surgical excision and correct diagnosis is essential to avoid unnecessary aggressive therapy. A unique case of Masson’s lesion presenting as an asymptomatic pericardial mass is reported for the first time. Multimodality imaging was used for a comprehensive non-invasive mass characterization. Relevant imagiological and pathological findings for differential diagnosis are discussed. The importance of close coordination between different medical specialties for optimal care of this unusual clinical condition is highlighted.