Compare conditions

Put any two — or three — conditions side by side, adult or pediatric, to spot the look-alike differences fast, row by row.

Pcos

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In one line

·The ovaries make too much male hormone, eggs do not release each month, and many small cysts sit on the ovaries.

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Normal physiology

·The hypothalamus (the brain's cycle timer), pituitary gland (the hormone messenger under the brain), and ovaries talk back and forth in a monthly loop to ripen and release one egg, then reset. This is called the HPO axis (hypothalamic-pituitary-ovarian axis). Keep that smooth cycle in your head, because every PCOS finding is a wrench thrown into this loop.

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What goes wrong

·Two breaks team up in PCOS. First, the body's cells stop listening to insulin (insulin resistance), so the pancreas floods the blood with extra insulin trying to force sugar inside. High insulin pushes the ovaries to overproduce testosterone and other male hormones (androgens). Second, the pituitary puts out too much LH and not enough FSH, so eggs start growing but stall before they can pop out. Without ovulation, no corpus luteum forms and progesterone never rises, leaving the uterus lining to grow wild and periods to scatter or disappear.

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Hallmark signs

·Irregular or missing periods
·Extra hair growth on face, chest, or belly (hirsutism)
·Acne that keeps coming back, especially on the jaw and chin
·Thinning hair on the scalp (like male-pattern baldness)
·Weight gain, especially around the belly, that is hard to lose
·Dark, velvety patches of skin in body folds (neck, armpits, groin)
·Trouble getting pregnant (infertility)
·Many small fluid-filled sacs (follicles) on the ovaries seen on ultrasound

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Red flags · escalate now

·Sudden severe belly pain (may mean an ovarian cyst twisted or burst)
·Very heavy vaginal bleeding that soaks through a pad every hour (may mean abnormal uterine lining growth)
·Signs of diabetes: extreme thirst, peeing all the time, blurry vision, or feeling very tired
·Symptoms that appear very fast in adulthood (may point to a tumor making male hormones instead of PCOS)
·Very deep voice or large muscle growth (signs of much higher androgen levels than PCOS usually causes)

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Workup

·Total and free testosterone
·TSH (thyroid-stimulating hormone)
·Prolactin
·17-hydroxyprogesterone (17-OHP)
·Fasting glucose and 2-hour oral glucose tolerance test (OGTT)
·LH-to-FSH ratio
·Lipid panel (total cholesterol, LDL, HDL, triglycerides)
·Pelvic ultrasound

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Treatment

·Weight loss of 5–10% through diet and exercise
·Combined oral contraceptive pill (estrogen + progestin)
·Metformin 1500–2000 mg daily (start low, go slow)
·Spironolactone 50–100 mg daily (up to 200 mg)
·Letrozole 2.5–5 mg daily for 5 days (if she wants to get pregnant)
·Annual screening for type 2 diabetes, dyslipidemia, obstructive sleep pauses in breathing (apnea), and depression

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NCLEX trap

·PCOS is one upstream problem (insulin resistance) that causes all the symptoms. Treat the root: help the patient lose 5–10% of their weight, use combination birth control pills or metformin to restore hormone balance, and fix insulin resistance. One fix helps all the downstream problems.
·Cystic ovaries are a sign on ultrasound, not the full diagnosis. To diagnose PCOS, you need 2 out of 3 Rotterdam criteria: irregular or no ovulation, high androgen levels (blood test or physical signs like excess hair), and polycystic ovaries on ultrasound. The real problem is insulin resistance → the ovaries make too much androgen → ovulation stops and cysts form.
·Many conditions mimic PCOS: thyroid disease (too much or too little thyroid hormone), high prolactin (a pituitary hormone that stops periods), Cushing syndrome (too much cortisol), congenital adrenal hyperplasia (enzyme defect that raises androgens), and androgen-secreting tumors. Always check TSH (thyroid), prolactin, 17-hydroxyprogesterone (adrenal screen), and free or total testosterone. Use the Rotterdam criteria. Never guess.
·PCOS raises the lifetime risk for type 2 diabetes (insulin resistance worsens over time), high blood pressure, high cholesterol, obstructive sleep pauses in breathing (apnea) (common with obesity and insulin resistance), depression and anxiety, and endometrial cancer (no periods = the uterine lining keeps growing without progesterone to shed it). Screen fasting glucose, lipids, and blood pressure every year. Even if the patient does not want to get pregnant, metabolic screening is essential.
·Lifestyle change is first-line: losing just 5–10% of body weight restores ovulation in many patients and improves insulin sensitivity. Metformin helps insulin work better and may restore cycles, but it is not a substitute for weight loss. Add combination oral contraceptives to regulate periods and lower androgens, or letrozole (an aromatase inhibitor) if the patient wants to ovulate for pregnancy.
·When a patient with PCOS has no period for 3 months or longer, the endometrium (uterine lining) keeps thickening because estrogen is present but progesterone (which sheds the lining) is not. This unopposed estrogen raises the risk of endometrial hyperplasia and cancer. You must either restore ovulation (weight loss, letrozole) or give cyclic progestin (e.g. medroxyprogesterone 10 mg for 10 days every 1–3 months) to protect the lining. Never leave the endometrium unopposed.

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