Familial coxa vara

Camptodactyly-arthropathy-coxa vara-pericarditis syndrome is a rare autosomal recessive genetic condition due to a mutation in the gene proteoglycan 4 (PRG4) – a mucin-type glycoprotein that acts as a lubricant for the cartilage surfaces. This gene is also known as lubricin. [Source: Wikipedia ]

May Cause
Coxa vara