A 28-year-old woman presents with 8 weeks of amenorrhea, sudden onset lower abdominal pain, and vaginal bleeding. Transvaginal ultrasound shows no intrauterine gestational sac but a 3 cm mass in the right fallopian tube with free fluid in the pelvis. Serum β-hCG is 45,000 mIU/mL. Regarding the management and pathophysiology of ectopic pregnancy, all of the following are true EXCEPT:

Explanation

## Analysis of Ectopic Pregnancy Management ### Why Option C is the EXCEPT Answer (Incorrect Statement) **Key Point:** Expectant management is NOT a safe option in this clinical scenario. The patient has a β-hCG of **45,000 mIU/mL**, a 3 cm tubal mass, and free fluid in the pelvis — all of which indicate a high-risk ectopic pregnancy with imminent or actual rupture. Expectant management is only appropriate when β-hCG is low (typically **<1,000–2,000 mIU/mL**), declining spontaneously, and there is no evidence of rupture or hemodynamic compromise. At β-hCG 45,000 mIU/mL, expectant management carries an unacceptably high risk of tubal rupture, hemorrhage, and maternal mortality. This makes Option C the FALSE statement. **High-Yield:** Criteria for expectant management of ectopic pregnancy (per Williams Obstetrics): - β-hCG < 1,000–2,000 mIU/mL AND declining - No cardiac activity on ultrasound - No evidence of rupture or hemoperitoneum - Hemodynamically stable and highly compliant patient ### Why the Other Options are TRUE (and therefore not the answer) | Option | Statement | Verdict | |--------|-----------|---------| | **A** | Fallopian tube accounts for >95% of ectopic pregnancies | ✅ TRUE — ampullary portion is most common (70%) | | **B** | Methotrexate is contraindicated when β-hCG >5,000 mIU/mL | ✅ TRUE in classical/NEET PG teaching — β-hCG <5,000 mIU/mL is a standard criterion for MTX eligibility per most Indian textbooks (Dutta's Obstetrics); at 45,000 mIU/mL, MTX is contraindicated | | **D** | Risk factors include PID, IUD, and endometriosis | ✅ TRUE — well-established risk factors per all standard references | **Clinical Pearl:** In this case with β-hCG 45,000 mIU/mL, free fluid in the pelvis, and a 3 cm tubal mass, the appropriate management is **surgical** (laparoscopic salpingectomy or salpingostomy). Both methotrexate and expectant management are contraindicated. The free fluid suggests possible rupture, making this a surgical emergency. **Mnemonic for MTX Contraindications in Ectopic — "RASH-LH":** - **R**upture (suspected or confirmed) - **A**bnormal renal/hepatic function - **S**ignificant hemoperitoneum - **H**igh β-hCG (>5,000 mIU/mL per standard teaching) - **L**actation / immunodeficiency - **H**ematologic abnormalities *Reference: Dutta's Obstetrics, 9th edition; Williams Obstetrics, 25th edition*