| A rare genetic primary bone dysplasia with decreased bone density disorder with characteristics of childhood-onset osteoporosis associated with recurrent, multiple, osteoporotic, long bone fractures and/or vertebral compression fractures, significant height loss in adulthood, low bone mineral density scores and otherwise no other abnormalities. Heterozygote females may be unaffected or have a milder phenotype. There is evidence the disease can be caused by mutation in the PLS3 gene on chromosome Xq23. |