Isolated GH deficiency due to a GHRH receptor mutation causes hip joint problems and genu valgum, and reduces size but not density of trabecular and mixed bone.
Epitácio-Pereira CC, Silva GM, Salvatori R, Santana JA, Pereira FA, Gois-Junior MB, Britto AV, Oliveira CR, Souza AH, Santos EG, et al. J Clin Endocrinol Metab. 2013 Nov; 98(11):E1710-5. Epub 2013 Sep 20.