Pseudohypoparathyroidism type I and Albright's hereditary osteodystrophy with a proximal 15q chromosomal deletion in mother and daughter.

A 33-year-old woman and her 71-year-old mother were both found to have pseudohypoparathyroidism type I with Albright's hereditary osteodystrophy associated with a cytogenetic deletion of the proximal part of one chromosome 15, resembling that found in Prader-Willi syndrome. As there are overlapping clinical features between these two syndromes a causal relationship cannot be excluded. However, molecular analyses with 10 probes from this region did not detect any uniparental disomy or deletion, features frequently found in Prader-Willi syndrome.