[Incomplete Hutchinson-Gilford syndrome. A patient followed to age 29]

A case is described with incomplete syndrome of Hutchinson-Gilford in a male, aged 29. The development of the disease in the patient was followed-up. The pathologoanatomical changes, observed in the patient were described. Resulting from a severe fibrocalcinosis of the mitral and aortic valves, a congestive cardiac insufficiency developed that led to death at the age of 16. It is stressed that is the "longest" lived patients with progeria, the causes for that being discussed. Some problems of the pathogenesis of the syndrome are also discussed.