Bone and cartilage are not inert; they are living, metabolically active tissues that respond to any change in the body. Endocrine disorders (disorders of the glands of internal secretion) also have a direct effect on the metabolic and musculoskeletal systems. Osteoporosis, osteomalacia, rickets, gout, pseudogout, Paget's disease, osteonecrosis, Fabry disease, Gaucher disease, Farber disease, homocystinuria, mucopolysaccharidoses, haemochromatosis, Wilson's disease, hyperparathyroidism and Cushing's syndrome are just some of the metabolic and endocrine diseases that have joint symptoms.
