HyGuru

Comment “USMLE Vitamins” and I’ll send you a FREE PDF guide covering the top NBME concepts related to Water-Soluble vitamins.

I’ll also send you a link to join my (new) USMLE Step 1 & Step 2 CK vignette based course.

My Step 1 bundle comes with a free 1-on-1 tutoring with me, so we can create a study plan & improve your test taking skills! 🔥

What’s included:

🔥 USMLE Vitamins PDF

💻 Enrollment link to my Step 1 & Step 2 CK course (perfect for dedicated, COMP/CBSE!)

🧠 1-on-1 tutoring if you join the USMLE Step 1 Bundle.

Comment “USMLE Vitamins” below and I’ll send you the details!

       

Edema is not a diagnosis. It’s a physiology problem.

Here’s a simple framework to make these questions easier on the USMLE.

💡 A patient develops bilateral leg edema, ascites, and diffuse soft-tissue swelling. How would you classify this edema?

Answer: Generalized edema = anasarca.

💡 A patient with worsening heart failure develops bilateral pitting edema. Which Starling force is driving fluid into the interstitium?

Answer: ↑ Hydrostatic pressure.

💡 A patient develops edema after losing large amounts of protein in the urine. Which mechanism best explains the swelling?

Answer: ↓ Plasma oncotic pressure.

💡 A patient with systolic heart failure develops worsening dependent edema. What is the primary mechanism?

Answer: ↑ Venous pressure → ↑ capillary hydrostatic pressure.

💡 A patient develops unilateral arm swelling after axillary lymph node dissection. What is the mechanism?

Answer: ↓ Lymphatic drainage → interstitial fluid accumulation.

The USMLE rarely wants you to simply recognize “edema.”

It wants you to connect the vignette → mechanism → diagnosis.

Save this framework for your next question block and follow Rahul Damania, MD for more USMLE approaches.

The USMLE doesn’t just want you to recognize erythema nodosum.

It wants you to ask: what is this associated with? 🧠🔗

Tender red nodules on the shins are the clue. The rest of the vignette gives you the diagnosis.

🫁 Sarcoidosis

Erythema nodosum + polyarthralgia + bilateral hilar lymphadenopathy

→ think Löfgren syndrome

On the USMLE, connect the skin finding to the systemic disease.

🧻 Inflammatory bowel disease

Erythema nodosum can be an extraintestinal manifestation of Crohn’s disease or ulcerative colitis.

Crohn’s clues: skip lesions + fistulas + cobblestoning + noncaseating granulomas

👄 Behçet disease

Recurrent oral ulcers + ge***al ulcers + uveitis

± erythema nodosum–like lesions

The skin finding is only one piece of the pattern.

This is the kind of association the NBME loves:

Skin finding → systemic association → diagnosis

Don’t memorize erythema nodosum in isolation integrate it!

Check out my brand new USMLE courses — link in my bio.

Hyponatremia on the USMLE Step 1 and Step 2 CK can be challenging. So, let’s make it simple over the next seven slides.

Here’s an NBME vignette:

🩺 Day 4 after severe TBI. Na⁺ 119, alert but confused. Salt problem or water problem?

The case builds as you swipe.

🔑 Water.

💡 Symptoms track how fast Na⁺ fell, not the number.

🩺 Now: HR 108, BP 96/58, dry mucosa. Volume status?

🔑 Hypovolemic.

💡 That alone argues against SIADH. Note: SIADH is euvolemic.

🩺 Serum osm 258. Is this true hyponatremia?

🔑 Yes, remember, serum osm is usually 2 x Na.

📢 Back to our case:

TBI + Na⁺ 119 + hypovolemia. Which labs comes next?

🔑 Urine studies.

💡 High urine Na > 20 & dehydration means that the urine is concentrated.

🩺 TBI + Na⁺ 119 + hypovolemia + urine Na⁺ high. Is this SIADH?

🔑 Careful.

💡 SIADH doesn’t make you dry.

🩺 So when I see TBI, hypovolemia & hyponatremia, what’s the diagnosis?

🔑 Cerebral Salt Wasting

💡 CSW makes you dry whereas SIADH makes you euvolemic.

🚨 Comment 𝐒𝐎𝐃𝐈𝐔𝐌 for my USMLE one-pager guide to help master this topic.