The production of substances with specific activity (hormones) by some tumour cells.
D004701:Endocrine Gland Neoplasms; D004702:Endocrine Glands; D006728:Hormones; D006801:Humans; D009369:Neoplasms / Q000502:physiology*
D006728:Hormones
ENDOCRINE GLANDS/neoplasms; NEOPLASMS/physiology