Reproductive confusion pairs
27 Reproductive topics students commonly mix up on Step 1, each with the fastest separator, a side-by-side comparison, and a free practice question.
- Chlamydia vs GonorrheaChlamydia is often quieter and intracellular with reactive-arthritis risk; gonorrhea is more purulent, diplococcal, and can disseminate to…Video
- Ectopic pregnancy vs Ovarian torsionEctopic starts with pregnancy status and absent intrauterine pregnancy; torsion starts with ovarian ischemia pattern.Video
- Preeclampsia vs Eclampsia and HELLPPreeclampsia is hypertension with proteinuria/end-organ signs; eclampsia adds seizures; HELLP adds hemolysis, liver enzymes, and low…Video
- Preeclampsia vs Chronic and gestational hypertensionPreeclampsia has after-20-week hypertension plus proteinuria/end-organ signs; chronic HTN starts before 20 weeks; gestational HTN lacks…
- Placenta previa vs Placental abruption, vasa previa, and uterine rupturePrevia: painless bleeding with placenta over the os; abruption: painful tender uterus; vasa previa: ROM with bleeding and fetal…
- Threatened abortion vs Inevitable, incomplete, complete, and missed abortionThreatened is bleeding with closed os and viable pregnancy; inevitable/incomplete have open os, complete empties uterus, missed retains…
- Complete molar pregnancy vs Partial molar pregnancyComplete mole is no fetus with very high hCG and diploid paternal genome; partial mole has fetal parts and triploidy.Video
- Gestational choriocarcinoma vs Non-gestational choriocarcinomaGestational choriocarcinoma follows pregnancy events; non-gestational choriocarcinoma is a germ cell tumor without pregnancy origin.
- PCOS vs Hypothyroid amenorrhea and hyperprolactinemiaPCOS is hyperandrogenic anovulation; hypothyroid amenorrhea has high TSH; hyperprolactinemia has galactorrhea and suppressed GnRH.
- Endometriosis vs Adenomyosis and fibroidsEndometriosis is ectopic implants with infertility and dyspareunia; adenomyosis is boggy painful uterus; fibroids are firm irregular…
- Endometrial hyperplasia vs Endometrial carcinomaHyperplasia is proliferative precursor from unopposed estrogen; carcinoma is invasive malignancy causing abnormal or postmenopausal…
- Endometrial cancer vs Cervical and ovarian cancerEndometrial cancer bleeds from uterus; cervical cancer bleeds with HPV/Pap cervix clues; ovarian cancer is vague bloating, mass, ascites,…
- Epithelial ovarian cancer vs Germ cell and sex-cord stromal ovarian tumorsEpithelial ovarian cancer is older and peritoneal/CA-125; germ cell is younger with AFP, LDH, or high hCG by subtype; sex-cord stromal is…
- Bacterial vaginosis vs Trichomonas and Candida vaginitisBV is fishy clue cells; Trichomonas is frothy motile strawberry cervix; Candida is itchy thick white pseudohyphae with normal pH.
- Mastitis and breast abscess vs Inflammatory breast cancerMastitis/abscess is infectious and often lactational; inflammatory breast cancer is malignant dermal lymphatic obstruction that mimics…
- Fibroadenoma and fibrocystic change vs Phyllodes tumor and breast cancerFibroadenoma is mobile rubbery benign mass; fibrocystic is cyclic cystic pain; phyllodes is large leaf-like stromal mass; cancer is hard…
- Ductal breast carcinoma vs Lobular breast carcinomaDuctal is mass-forming duct disease; lobular is E-cadherin loss with single-file dyscohesive cells and multifocal subtle disease.
- Paget disease of breast vs Paget disease of boneBreast Paget is nipple carcinoma spread; bone Paget is high-turnover disorganized bone remodeling with elevated alkaline phosphatase.
- Pelvic inflammatory disease vs Ectopic pregnancy and ovarian torsionPID is infectious cervical motion tenderness; ectopic is hCG-positive pregnancy outside uterus; torsion is sudden unilateral ischemic…
- Uterine atony vs Trauma, tissue, and thrombin postpartum hemorrhage causesTone is boggy atony; trauma bleeds despite firm uterus; tissue is retained placenta; thrombin is coagulopathy.
- Normal lochia vs Abnormal postpartum bleeding or infectionNormal lochia decreases and changes color without systemic symptoms; abnormal lochia is heavy, foul, febrile, tender, or recurrently…
- Cryptorchidism and hydrocele or varicocele vs Testicular torsionCryptorchidism/hydrocele/varicocele are chronic structural findings; torsion is acute ischemic pain with absent cremasteric reflex.
- Seminoma vs Nonseminomatous germ cell tumorsSeminoma is uniform radiosensitive PLAP-positive tumor without AFP; nonseminoma is mixed/aggressive with AFP or high hCG markers.Video
- BPH vs Prostate cancer and prostatitisBPH is smooth transition-zone obstruction; cancer is hard peripheral-zone malignancy; prostatitis is painful inflamed prostate.Video
- Psychogenic erectile dysfunction vs Organic erectile dysfunctionPsychogenic ED is situational with preserved nocturnal erections; organic ED is persistent with lost nocturnal erections or medical risk…
- Primary hypogonadism vs Secondary hypogonadismPrimary hypogonadism has high LH/FSH from gonadal failure; secondary hypogonadism has low or normal LH/FSH from central failure.
- Klinefelter syndrome vs Kallmann syndrome and Turner syndromeKlinefelter is XXY male primary hypogonadism; Kallmann is anosmic central hypogonadism; Turner is X-monosomy female gonadal dysgenesis…