Question: What is (are) Kuskokwim disease ?
Answer: Kuskokwim disease is a congenital (present at birth) contracture disorder that occurs solely among Yup'ik Eskimos in and around the Kuskokwim River delta region of southwest Alaska. Affected individuals usually, but not always, have congenital contractures of large joints (especially knees and/or elbows) and spinal, pelvic, and foot deformities. Other skeletal features have also been reported. Kuskokwim disease has been shown to be caused by mutations in the FKBP10 gene and is inherited in an autosomal recessive manner.
Source: GARD