Digestive 
Blood
Cardiovascular
Dermatology
Genitourinary,
Hormones
Infections
Oncology and
Musculo-skeletal
Mental health and
Parasites
Respiratory
Senses
Various
Hyperparathyroidism - the parathyroid glands function to excess - the level of calcium in the blood is usually elevated, there’s an increase of renal colics and brittle bones (osteoporosis), which means there’s a greater chance of fracturing a bone.
Hypoparathyroidism - the inadequate functioning of the parathyroid glands - is much less common and usually occurs after surgery on the thyroid gland, which entails the existence of hypocalcaemia.
