Anorexia, malabsorption syndromes, ectopic ACTH, drugs (thiazide diuretics, insulin, granulocyte growth factor, glucocorticoids), antineoplastic drugs (cisplatin, ifosfamide, anti-EGFR agents, mTOR inhibitors, eribulin, abiraterone). This evidence concerns the gene MTOR and malabsorption syndrome.