A usually benign tumor of the adrenal medulla or the sympathetic nervous system in which the affected cells secrete increased amounts of epinephrine or norepinephrine.

• 嗜铬细胞瘤肾上腺髓质或交感神经系统的一种通常为良性的肿瘤，其中这种患病的细胞分泌会增加肾上腺素与正肾上腺素的数量