The size of [Rachmaninov's] hands may have been a manifestation of Marfan's syndrome, their size and slenderness typical of arachnodactyly. However, Rachmaninov did not clearly exhibit any of the other clinical characteristics typical of Marfan's, such as scoliosis, pectus excavatum, and eye or cardiac complications. Nor did he express any of the clinical effects of a Marfan-related syndrome, such as Beal's syndrome (congenital contractural arachnodactyly), Ehlers-Danlos syndrome, homocystinuria, Stickler syndrome, or Sphrintzen-Goldberg syndrome. There is no indication that his immediate family had similar hand spans, ruling out familial arachnodactyly. Rachmaninov did not display any signs of digital clubbing or any obvious hypertrophic skin changes associated with pachydermoperiostitis.