Gastroenterology

Rheumatology

Arthritis

Connective tissue disease
- Systemic lupus erythematosus
- Antiphospholipid syndrome
- Systemic sclerosis
- Polymyositis and dermatomyositis
- Sjögren's disease (keratoconjunctivitis sicca)

Systemic inflammatory vasculitis
- Large vessel vasculitis
  - Polymyalgia rheumatica
  - Giant cell arteritis
  - Takayasu's arteritis
- Medium-sized vessel vasculitis
  - Polyarteritis nodosa
  - Kawasaki's disease
- Small vessel vasculitis
Bone disease
Disorders of calcium metabolism
- Hypercalcaemia
- Hypocalcaemia