AIM • KMU EXAM REASONING

Question:

A 24-year-old woman presents with irregular menstrual cycles, infertility, acne and increasing facial hair. She is overweight and has acanthosis nigricans. Laboratory assessment shows biochemical hyperandrogenism. Which change most directly contributes to the increased biologically active androgen level in this patient?

Options:

Correct Answer: Reduced hepatic production of sex hormone-binding globulin due to hyperinsulinemia

Explanation: Hyperinsulinemia in PCOS reduces hepatic SHBG production and also promotes ovarian androgen synthesis, increasing the circulating free androgen fraction.

Question:

A 36-year-old woman reports progressively heavy menstrual bleeding and difficulty conceiving. Ultrasonography demonstrates a well-circumscribed uterine mass that projects into and distorts the endometrial cavity. Which type of leiomyoma best explains both findings?

Options:

Correct Answer: Submucosal leiomyoma

Explanation: Submucosal fibroids distort the endometrial cavity, making heavy bleeding and interference with implantation more likely than with outward-growing subserosal lesions.

Question:

A 31-year-old woman with infertility, deep dyspareunia and progressively worsening dysmenorrhea undergoes laparoscopy. Dark pelvic implants and an ovarian cyst containing old brown material are identified. Which microscopic finding would most strongly support the suspected diagnosis?

Options:

Correct Answer: Endometrial glands and stroma with hemosiderin-laden macrophages

Explanation: Endometriosis contains ectopic endometrial glands and stroma; recurrent hemorrhage commonly produces hemosiderin and hemosiderin-laden macrophages.

Question:

A 29-year-old woman is investigated for persistent abnormal uterine bleeding and infertility. Endometrial biopsy shows a chronic inflammatory infiltrate. Which cell type within the endometrial stroma provides the most characteristic evidence for chronic endometritis?

Options:

Correct Answer: Plasma cells

Explanation: Plasma cells within endometrial stroma are the key histological clue to chronic endometritis and help distinguish it from normal cyclical leukocyte populations.

Question:

A woman undergoing ovulation induction develops several mature follicles after treatment with recombinant FSH. The clinician now wishes to mimic the physiological LH surge to induce final follicular maturation. Which drug is most appropriate?

Options:

Correct Answer: Human chorionic gonadotropin

Explanation: hCG activates LH receptors and is used to mimic the LH surge, triggering final follicular maturation and ovulation after follicular stimulation.

Question:

A 33-year-old woman with symptomatic endometriosis is prescribed a continuous long-acting GnRH agonist. During the first few days she experiences transient worsening of pelvic symptoms, followed later by marked suppression of ovarian estrogen production. Which mechanism explains the later therapeutic effect?

Options:

Correct Answer: Down-regulation and desensitization of pituitary GnRH receptors

Explanation: Continuous GnRH agonist exposure initially causes a flare but subsequently down-regulates pituitary receptors, reducing FSH, LH and ovarian estrogen production.

Question:

A 27-year-old woman with chronic anovulatory infertility is started on clomiphene. Ovulation occurs during subsequent cycles. Which pharmacological action best explains this response?

Options:

Correct Answer: Reduction of estrogen negative feedback at the hypothalamus

Explanation: Clomiphene blocks estrogen feedback centrally, increasing GnRH and subsequently FSH/LH secretion, which promotes follicular development and ovulation.

Question:

A woman treated for endometriosis develops acne, increased facial hair and a deeper voice after several months of therapy. Which drug most likely produced these adverse effects?

Options:

Correct Answer: Danazol

Explanation: Danazol has androgenic activity; acne, hirsutism and voice deepening are characteristic adverse effects that limit its use in endometriosis.

Question:

A 30-year-old woman has been unable to conceive for 18 months. Her cycles are regular and ovulatory, and pelvic ultrasonography shows normal ovaries and uterus. She has a previous history of pelvic infection. Contrast assessment demonstrates bilateral failure of dye to pass through the fallopian tubes. Which factor is the principal cause of infertility?

Options:

Correct Answer: Tubal obstruction

Explanation: Bilateral tubal blockage prevents sperm–oocyte transport and fertilization despite normal ovulation and a structurally normal uterus.

Question:

A 32-year-old woman with longstanding PCOS has menstrual periods only a few times each year and is not receiving cycle-regulating therapy. Which long-term complication is most directly related to persistent anovulation in this patient?

Options:

Correct Answer: Endometrial hyperplasia

Explanation: Chronic anovulation prevents regular progesterone exposure, leaving the endometrium under prolonged relatively unopposed estrogenic stimulation.

Question:

A 34-year-old nulliparous woman has heavy menstrual bleeding and infertility. Imaging shows a cavity-distorting uterine fibroid. She wishes to preserve her uterus and attempt pregnancy. Which management principle best matches her reproductive goal?

Options:

Correct Answer: Myomectomy with uterine preservation

Explanation: Myomectomy removes clinically important fibroids while preserving the uterus, making it appropriate when future fertility is desired.

Question:

A 47-year-old woman has several uterine leiomyomas that have gradually decreased in size after menopause. Which property of these tumors best explains this change?

Options:

Correct Answer: Growth responsiveness to ovarian steroid hormones

Explanation: Leiomyomas are hormonally responsive; reduced estrogen and progesterone stimulation after menopause commonly causes them to regress.

Question:

A 39-year-old woman presents with irregular heavy uterine bleeding. Pregnancy testing is negative, ultrasonography shows no polyp or fibroid, and there is no evidence of malignancy. Her cycles have become increasingly anovulatory. Under the PALM–COEIN approach, which category best fits the likely cause?

Options:

Correct Answer: Ovulatory dysfunction

Explanation: Anovulatory bleeding belongs to the non-structural COEIN group, specifically ovulatory dysfunction, when structural pathology has not been identified.

Question:

A 20-year-old woman has cramping lower abdominal pain beginning shortly before each menstrual period. Pelvic examination and ultrasonography show no pelvic pathology. Which primary-care treatment best targets the major mediator responsible for her symptoms?

Options:

Correct Answer: Nonsteroidal anti-inflammatory drug

Explanation: Primary dysmenorrhea is strongly related to prostaglandin-mediated uterine contractions; NSAIDs reduce prostaglandin synthesis and relieve pain.

Question:

A 61-year-old multiparous woman complains of a vaginal bulge and pelvic dragging that worsen after prolonged standing. Examination confirms uterovaginal prolapse. Which underlying abnormality most directly accounts for this condition?

Options:

Correct Answer: Failure of pelvic-floor and connective-tissue support

Explanation: Childbirth, aging and repeated increases in intra-abdominal pressure can weaken pelvic-floor muscles and fascial support, allowing pelvic organs to descend.

Question:

A 48-year-old woman reports small amounts of urine leakage whenever she coughs, laughs or lifts a heavy object. She does not describe a sudden compelling desire to void before leakage. Which type of urinary incontinence is most likely?

Options:

Correct Answer: Stress urinary incontinence

Explanation: Leakage triggered by a rise in intra-abdominal pressure without preceding urgency is characteristic of stress incontinence due to inadequate urethral support or sphincter competence.

Question:

A 55-year-old woman develops sudden intense urinary urgency and frequently leaks urine before reaching the toilet. Post-void residual volume is not elevated. Which functional disturbance best explains her symptoms?

Options:

Correct Answer: Involuntary detrusor contraction during bladder filling

Explanation: Urge incontinence is commonly associated with detrusor overactivity, producing urgency and leakage during the bladder-filling phase.

Question:

A 67-year-old woman reports continuous dribbling, weak urinary stream and a persistent sensation of incomplete bladder emptying. Which investigation would be most useful for supporting overflow incontinence as the mechanism?

Options:

Correct Answer: Post-void residual urine assessment

Explanation: Overflow incontinence results from inadequate bladder emptying; a raised post-void residual supports chronic urinary retention as the underlying problem.

Question:

During assessment of a woman with postpartum pelvic-floor weakness, the clinician explains that injury to a central fibromuscular structure can reduce support of the vagina and pelvic organs. Which structure is being described?

Options:

Correct Answer: Perineal body

Explanation: The perineal body is a central fibromuscular attachment point for pelvic-floor muscles and contributes importantly to support of the vagina and adjacent pelvic organs.

Question:

A student compares the pharmacokinetics of recombinant FSH with an orally administered small-molecule fertility drug. Why must therapeutic gonadotropins generally be administered parenterally?

Options:

Correct Answer: They are peptide or glycoprotein hormones degraded in the gastrointestinal tract

Explanation: Gonadotropins are protein hormones that would be digested in the gastrointestinal tract, so clinically useful preparations are administered parenterally.