<Tr> <Th> Occupation </Th> <Td> Actor, singer </Td> </Tr> <Tr> <Th> Height </Th> <Td> 1.17 m (3 ft 10 in) </Td> </Tr> <P> Michael Dunn (October 20, 1934--August 30, 1973) was an American actor and singer . He inspired a number of actors that were smaller and shorter than most "average" people, including Zelda Rubinstein, Mark Povinelli, and Ricardo Gil . </P> <P> Dunn had medical dwarfism, a result of spondyloepiphyseal dysplasia (SED, subtype unknown), a genetic defect of cartilage production caused by a mutation in the COL2A1 (type II collagen) gene . This disorder, classified as a skeletal dysplasia, caused distorted development of his limbs, spine, and ribcage and led to early, widespread osteoarthritis and constricted lung growth . As an adult, he stood 3' 10" and weighed about 78 pounds (117 cm, 35 kg). During Dunn's lifetime, his condition was described by the nonspecific term "progressive chondrodystrophy," or alternatively as "achondroplasia", a term that now refers specifically to a skeletal dysplasia caused by a defect in the gene for fibroblast growth factor receptor 3 . </P>

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