This condition is inherited in an autosomal recessive manner
Eiken syndrome, also known as "Eiken skeletal dysplasia", is a rare[1]autosomal bone dysplasia with a skeletal phenotype which has been described in a unique consanguineous family, where it segregates as a recessive trait.[2][3] First described in 1985, the syndrome primarily affects the development of bones, leading to short stature, long limbs, and joint dislocations. Eiken syndrome is caused by mutations in the PTH1R gene, located on chromosome 3, and is involved in skeletal development.[4][5]
^Eiken, M., Prag, J., Petersen, K. and Kaufmann, H. (1984) A new familialskeletal dysplasia with severely retarded ossification and abnormal modeling of bones especially of the epiphyses, the hands, and feet. Eur. J. Pediatr., 141, 231–235.