Source / episode info

• **Episode:**645
• **Title:**DIP Ep 645: USMLE Free 86 Series 7 (Q57-66, for Step 2/3)
• **Published:**2026-04-02
• Source:Episode page

One-liner

This episode covers critical board topics including the workup of resistant hypertension suggestive of fibromuscular dysplasia and renal artery stenosis; the appropriate follow-up for high-grade squamous intraepithelial lesions (colposcopy); diagnosis of aortic dissection in substance users; management of hypocalcemia post-thyroidectomy; and recognizing acute vaso-occlusive crises in sickle cell disease.

High-yield summary

• Resistant Hypertension/Renal Artery Stenosis: When evaluating a young patient with resistant hypertension, epigastric bruit, and signs of renal compromise (e.g., FMD), the initial diagnostic steps include checking basic metabolic panel (BUN/Cr) and performing a renal duplex ultrasound to assess blood flow in the renal arteries.
• Cervical Dysplasia Workup: A Pap smear showing High-Grade Squamous Intraepithelial Lesion (HSIL) requires immediate follow-up with colposcopy, which is followed by targeted biopsy if necessary. Repeating the Pap smear or performing a routine culture/biopsy is incorrect.
• Aortic Dissection: In patients with risk factors like chronic substance abuse and presenting with acute, tearing abdominal pain, suspicion for aortic dissection must be high; aspirin use in the acute phase is contraindicated due to increased bleeding risk into the media.
• Hypocalcemia Post-Thyroidectomy: Paresthesias following thyroid surgery strongly suggest hypoparathyroidism (due to accidental parathyroid gland removal/damage). The classic physical exam signs are Chvostek's sign and Trousseau's sign.
• Tricuspid Endocarditis: In IV drug users presenting with a new murmur, the most likely diagnosis is tricuspid valve endocarditis (right-sided involvement). A key physical finding is an increased intensity of the murmur upon deep inspiration (Carvallo's sign).

Learning objectives

• Differentiate between various causes and initial workups for resistant hypertension suggestive of renovascular disease.
• Outline the correct diagnostic pathway following an abnormal Pap smear result (HSIL).
• Recognize the clinical presentation, risk factors, and immediate management considerations for aortic dissection.
• Identify the classic physical signs associated with hypocalcemia following parathyroid gland manipulation.
• Correlate IV drug use patterns with specific sites of endocarditis (right heart valves).

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