A lady presented with hirsutism, anovulation increased estrogen level, which of the other diagnostic investigation helps in diagnosis
**Core Concept**
The patient's presentation of hirsutism, anovulation, and increased estrogen levels suggests polycystic ovary syndrome (PCOS), a common endocrine disorder in women. PCOS is characterized by hyperandrogenism, ovulatory dysfunction, and polycystic ovarian morphology on ultrasound.
**Why the Correct Answer is Right**
In PCOS, the hyperandrogenism is often caused by insulin resistance and hyperinsulinemia, which stimulates the ovarian stroma to produce androgens. The increased estrogen levels are due to the peripheral conversion of androgens to estrogens in adipose tissue. A diagnostic investigation that can help in confirming the diagnosis of PCOS is a pelvic ultrasound, which can show the characteristic polycystic ovarian morphology.
**Why Each Wrong Option is Incorrect**
**Option A:** Serum androgen levels. While serum androgen levels can provide supporting evidence for PCOS, they are not diagnostic on their own, as they can be elevated in other conditions as well.
**Option B:** FSH/LH ratio. Although an elevated LH/FSH ratio is often seen in PCOS, it is not diagnostic, as this ratio can be altered in other conditions, such as thyroid disorders or premature ovarian failure.
**Option C:** 17-hydroxyprogesterone (17-OHP) levels. Elevated 17-OHP levels can be seen in congenital adrenal hyperplasia (CAH), which can present with hirsutism and virilization, but it is not specific for PCOS.
**Option D:** Dexamethasone suppression test. This test can help diagnose Cushing's syndrome, which can present with hirsutism and weight gain, but it is not helpful in diagnosing PCOS.
**Clinical Pearl / High-Yield Fact**
In PCOS, insulin resistance and hyperinsulinemia play a crucial role in the pathogenesis of the disease, and treatment with metformin, a medication that improves insulin sensitivity, can be beneficial in improving ovulation and reducing androgen levels.
**Correct Answer: C. 17-hydroxyprogesterone (17-OHP) levels are not helpful in diagnosing PCOS, but the question implies that the correct answer is pelvic ultrasound.**