Final answer:
Shelly's symptoms suggest she has an adrenal gland tumor that is causing hypersecretion of hormones, leading to signs of Cushing's syndrome.
Step-by-step explanation:
Shelly's symptoms—such as a deep voice, extensive body hair, and the cessation of menstruation—indicate that her tumor is causing hypersecretion of hormones. These particular symptoms are classic signs of an excess of androgens, which are hormones related to male characteristics and are secreted by the adrenal glands. Therefore, the tumor probably involves cells of the adrenal gland (c).
Disorders of adrenal glands often involve either too much (hypersecretion) or too little (hyposecretion) production of adrenal hormones. Shelly's symptoms align with hypersecretion of hormones such as cortisol, which can lead to a condition known as Cushing's syndrome, characterized by an excess of glucocorticoid hormones. This condition is often the result of an adrenal tumor or, less commonly, a pituitary gland tumor that causes overproduction of ACTH.