The reopening of old, previously healed wounds (a phenomenon known as wound dehiscence) is caused by severe Vitamin C deficiency (Scurvy).
Pathophysiological Mechanism
Cofactor for Collagen Hydroxylation: Vitamin C (ascorbic acid) acts as an essential cofactor for the enzymes prolyl hydroxylase and lysyl hydroxylase. These enzymes are responsible for the post-translational hydroxylation of proline and lysine residues in procollagen.
Triple-Helix Stabilization: Hydroxylation is critical for forming inter-chain hydrogen bonds that stabilize the collagen triple-helix structure. Without functional collagen synthesis, cross-linking fails, leading to unstable mature collagen.
Continuous Turnover of Scar Tissue: Scar tissue is not static; mature collagen undergoes constant ongoing degradation and synthesis (remodeling). In severe deficiency, new collagen cannot form to replace degraded tissue, leading to the breakdown of existing scars and the reopening of old wounds.
Diagnosis: Superior vena cava (SVC) syndrome
SVC obstruction increases venous pressure in territories normally drained by the SVC.
The body attempts to compensate by recruiting collateral venous pathways, including:
Azygos system + internal thoracic veins + vertebral venous plexus
Clinically, patients may develop:
Facial/periorbital edema
Neck swelling
Dilated neck/chest veins
Upper-limb edema
Headache
Dyspnea
Severe cases can cause laryngeal/cerebral edema, making the condition potentially life-threatening.
Based on A Real Scenario.
A man develops severe asthma every time he has intercourse with his wife—but only without a condom. The culprit wasn’t sex, exercise, latex, or semen. What medication was his wife taking?
Q- Reflex bradycardia caused by alpha-1-agonists is blocked by which of the following medications?
A- Adrenaline
B- Atropine
C- Metoprolol
D- Phenylephrine
Acute Asthma in ER
A 22-year-old asthmatic walks into ER.
He is sitting forward.
Can barely finish a sentence.
SpO₂ 89%.
The biggest mistake now?
“Nebulize and see.”
First, decide: Is this severe? 🧵 1/8
A 62-year-old male presents with painless gross hematuria. He has a 40 pack-year smoking history. What is the first-line investigation to evaluate the lower urinary tract?
A. Ultrasound KUB
B. Flexible cystoscopy
C. Non-contrast CT KUB
D. Urine cytology
The easiest publication in medicine is one most students never attempt.
A Letter to the Editor takes 300–400 words and can be written in a weekend.
If you’ve never published anything, start here.
Here’s the exact format
A 26-year-old woman at 18 weeks’ gestation has acute cystitis due to E. coli.
Which is the safest oral antibiotic?
A. Nitrofurantoin
B. Doxycycline
C. Ciprofloxacin
D. Cotrimoxazole