Which hormone is listed as a hormonal-related cause of hirsutism?

• A. ACTH
• B. TSH
• C. GH
• D. LH

Answer: (A)

Hirsutism stems from excess androgens, which can come from either the adrenal glands or the ovaries. ACTH is the hormone that stimulates the adrenal cortex to produce androgens such as DHEA and androstenedione. When ACTH activity is high or adrenal glands are particularly responsive, these androgens increase and can convert to testosterone in peripheral tissues, promoting hair growth in androgen-sensitive areas. That direct link between ACTH and adrenal androgen production is why it’s listed as a hormonal-related cause of hirsutism. Other hormones here aren’t the primary drivers of this condition—TSH relates to thyroid function, GH isn’t a main cause of androgen excess, and while LH can influence ovarian androgen production, the adrenal pathway driven by ACTH is a key hormonal source of hirsutism.