Two cases of Barre-Masson disease

In 1920, Barre first reported a patient suffering from causalgic pain associated with a subungual tumor on the hand. 4 years later, Barre published 4 observations of such tumors. Masson made a detailed histological examination of these tumors and established their origin from the vascular glomeruli of the skin. Since then, they have been called Barre-Masson tumors.