Table 1.

Physiological disorders and associated cause for fatigue in cancer[36]

Physiological disorders	Associated problems
Decreased oxygen carrying capacity	Heart disease, lung cancer, anemia
Metabolic disorders	Liver metastasis
Hypokalemia	Dehydration
Hypophosphatemia	Diarrhea
Hypocalcemia	Renal damage
Hypomagnesemia	Hyperthyroidism, effects of medication
Nutritional disorder	Malnutrition
Anorexia	Mucositis
Cachexia	Gastrointestinal symptoms
Endocrine and hormonal disturbances	Diabetes, low testosterone levels
Disruption of central nervous system functioning	Brain tumors, toxicity from cytotoxic treatment
Immunological disorders	Neutropenia as a result of cancer treatment