DermaDrill

DermaDrill

DUPILUMAB

Anti-IL-4/IL-13 Biologic Therapy


MECHANISM OF ACTION

Fully human IgG4 monoclonal antibody
Binds to IL-4Rα subunit → Blocks signaling of IL-4 and IL-13
Inhibits Type 2 inflammation → Reduces symptoms & disease progression



INDICATIONS

Approved Uses

• Atopic Dermatitis ≥ 6 months
• Asthma ≥ 6 years
• CRSwNP ≥ 12 years
• Eosinophilic Esophagitis ≥ 1 year, ≥15kg
• Prurigo Nodularis Adults only
• COPD Adults only
• Chronic Spontaneous Urticaria ≥12 years
• Bullous Pemphigoid Adults only


DOSAGE & ADMINISTRATION

• Route: Subcutaneous Injection
• Loading Dose: 600mg (2x300mg) for most indications
• Maintenance: 300mg every 2 weeks (Q2W)
• Pediatric: Weight-based dosing



ADVERSE EFFECTS

• Common: Injection site reactions, Conjunctivitis, Arthralgia, Herpes simplex, Eosinophilia
• Serious: Hypersensitivity/Anaphylaxis, New-onset psoriasis, Joint pain, Ocular complications



PRECAUTIONS

• Contraindication: Hypersensitivity to dupilumab or excipients
• Avoid: Live vaccines during treatment
• Note: Do not stop systemic steroids abruptly; taper gradually
• Not for: Acute bronchospasm or status asthmaticus

DermaDrill

Sleep and skin are best friends

How good sleep helps your skin

Skin repair time:

While you sleep, your skin makes new cells and repairs damage from sun, pollution, and stress.

More collagen: Deep sleep boosts collagen → firmer, smoother skin.

Glow boost: Better blood flow at night = fresh, healthy glow in the morning.

Less inflammation: Helps calm acne, eczema, rosacea, and redness.

Balanced oil: Proper sleep keeps oil glands in check → fewer breakouts.

What poor sleep does to skin 😬

Dark circles & puffy eyes

Dull, tired-looking skin

More pimples (stress hormone cortisol goes up)

Faster wrinkles & fine lines

Slower healing of acne marks and wounds

How much sleep does skin need?
Adults: 7–9 hours
Kids: 9–11 hours
Teens: 8–10 hours

Skin-friendly sleep tips 🌙

Sleep on a clean pillowcase (change 2–3×/week)

Use silk or satin pillowcases (less friction & hair breakage)

Apply a night moisturizer before bed

Avoid screens 30–60 minutes before sleep

Sleep on your back if possible (less face creasing)

A 69-year-old man presented with vesicles on his back and right trunk after surgery. Test results for varicella-zoster virus were negative.
Biopsy revealed focal acantholytic dyskeratosis associated with varying degrees of papillomatosis.
Diagnosis?

🪧 Diagnosis:
Zosteriform Grover disease (Transient acantholytic dermatosis)

Why this fits:

Elderly patient (69 years) – classic age group for Grover disease

Acute onset after surgery – a well-known trigger (heat, sweating, immobilization, stress)

Unilateral/zosteriform distribution on the trunk, mimicking herpes zoster

VZV tests negative – rules out shingles

Histopathology: focal acantholytic dyskeratosis with papillomatosis → hallmark of Grover disease

📌 Key point:

Grover disease can rarely present in a zosteriform or dermatomal pattern, leading to frequent misdiagnosis as herpes zoster—especially post-operatively.

🔎 Important differentials ruled out:

Herpes zoster → VZV negative
Darier disease → chronic, genetic, earlier onset
Hailey–Hailey disease → intertriginous, recurrent, different clinical context

📌 Final answer: Zosteriform (unilateral) Grover disease

✨ Tranexamic Acid (TXA) in Dermatology

🧬 Mechanism of Action

TXA is an antifibrinolytic that:

⛔ Blocks plasminogen → plasmin conversion
⛔ Reduces plasmin-induced melanocyte activation

↓ UV-triggered melanogenesis
↓ Inflammation & angiogenesis (helps red + brown lesions)

Stabilizes dermo-epidermal junction

👉 Result: Reduction in both pigmentation & erythema

📌 Dermatologic Indications (Evidence-based)
Condition

Strength of Evidence
Melasma
⭐⭐⭐⭐⭐ (Gold indication)
PIH
⭐⭐⭐⭐
Laser-induced hyperpigmentation prevention
⭐⭐⭐⭐
Refractory pigmentary disorders
⭐⭐⭐
Rosacea (ETR)
⭐⭐⭐ (↓ erythema + telangiectasia)
Post-acne erythema
⭐⭐⭐

💊 Formulations & Dosing

1️⃣ Oral TXA (most evidence)
250 mg BID
Duration: 8–12 weeks, up to 6 months
Reassess thrombotic risk before extending

2️⃣ Topical TXA
2–5% serum/cream
OD–BD application
Great safety profile, moderate efficacy

3️⃣ Intradermal / Mesotherapy TXA
4–10 mg/mL
Every 2–4 weeks
3–6 sessions typical
Effective for refractory melasma, erythema

⚠️ Safety & Side Effects

Common:
GI upset, nausea
Headache, dizziness
Menstrual irregularities
Local irritation (topical/intradermal)

🚨 Rare/serious:
Thromboembolism (DVT/PE)
→ Risk assessment is mandatory for oral use

🚫 Contraindications

Personal/FH of thrombosis
Coagulation/Thrombophilia disorders
Pregnancy & breastfeeding (avoid oral; topical caution)
Concurrent estrogen-containing OCPs (relative contraindication)
📌 EC pill & smoking increase clot risk → Avoid combo

💡 Clinical Pearls

🌞 Photoprotection is essential or results relapse
Works best combined with:
≥ SPF 50 sunscreen
Hydroquinone / Kojic acid
Laser or microneedling (with caution
Asian skin types show high response rates
Melasma recurrence expected — maintenance needed

DermaDrill

✅ 1. IgE-mediated Angioedema

Key clue: Sudden onset after seafood exposure + throat tightness.
Always think airway first → consider epinephrine if progression.

✅ 2. Orbital Cellulitis

Red flags matched: pain with eye movement + fever + unilateral swelling.
This differentiates it from preseptal cellulitis.

👁️ Emergency + IV antibiotics ± imaging.

✅ 3. Morbihan Disease

Chronic non-pitting edema + rosacea history = classic.
Often resistant to treatment → isotretinoin and sometimes surgical debulking.

✅ 4. Filler Vascular Compromise

Pain + livedo pattern after HA filler = ischemia until proven otherwise.
Immediate hyaluronidase is critical.

⏱️ Every minute matters to avoid necrosis.

✅ 5. Nephrotic Syndrome

Morning periorbital edema + foamy urine = protein loss red flag.

⭐ Bonus Rapid Memory Trick

"FAST FACE" for Facial Edema Causes:

Letter Meaning

F Filler complications

A Allergic / Angioedema

S Systemic (Renal / Thyroid / Cardiac)

T Trauma / Surgery / Iatrogenic

F Fever → Infection (cellulitis, orbital)

A Autoimmune (DM, SLE)

C Chronic rosacea / Morbihan

E Erysipelas / Erysipeloid

DermaDrill

🧪 Facial Edema — Short Case Quiz

Case 1

A 29-year-old woman presents with sudden lip swelling and mild throat tightness after eating prawns. No fever. Skin is warm but not painful. No discharge.

Most likely diagnosis?

a) Cellulitis
b) IgE-mediated angioedema
c) Hypothyroidism
d) Hereditary angioedema

---

Case 2

A 56-year-old diabetic patient has unilateral painful red swelling around the left eye, fever, and pain with eye movement.

What is the priority concern?

a) Preseptal cellulitis
b) Orbital cellulitis
c) Allergic edema
d) Rosacea-related edema

---

Case 3

A 42-year-old male with known rosacea presents with chronic non-pitting forehead and periorbital swelling for 6 months. No itching, no urticaria.

Best diagnosis?

a) Contact dermatitis
b) Morbihan disease
c) Dermatomyositis
d) Post-laser edema

---

Case 4

A patient received a nasolabial fold HA filler injection 30 minutes ago. They now have painful localized swelling with livedoid discoloration.

Next best step?

a) Oral antihistamine
b) Apply ice
c) Inject hyaluronidase ASAP
d) Start oral steroids only

---

Case 5

A child presents with morning-dominant periorbital puffiness and frothy urine for 2 weeks. No fever or pain.

Most likely underlying condition?

a) Nephrotic syndrome
b) Allergic conjunctivitis
c) Viral infection
d) Erysipelas

DermaDrill

Facial Edema in Dermatology

🧠 Why This Topic?

Facial swelling is common and can be benign, allergic, infectious, autoimmune, or systemic. Quick pattern recognition helps avoid misdiagnosis—especially when angioedema or orbital infections are involved.

📌 Differential Diagnosis

Allergic
Immunologic Sudden onset, itching, urticaria Angioedema, Contact dermatitis

Infectious Painful, warm, unilateral Cellulitis, Erysipelas, Herpes zoster

Inflammatory Autoimmune Chronic, associated systemic symptoms Dermatomyositis (heliotrope rash), Lupus, Morbihan disease

Dermatosurgical Iatrogenic Recent injections/procedures Filler edema, vascular compromise, post-laser swelling

Renal / Systemic Causes Periorbital morning edema Nephrotic syndrome, Hypothyroidism

Ocular emergencies Pain, ophthalmoplegia Orbital cellulitis

🩺 Red-Flag Features (Require Urgent Action)

Tongue or airway involvement → suspect Angioedema

Fever + severe unilateral red swelling → Orbital cellulitis

Vision changes after fillers → vascular occlusion

Purple discoloration after injection → ischemia

💉 Procedure-Related

If patient had fillers:

Is the swelling immediate or delayed?

Is there pain or dusky discoloration → think vascular compromise

Is swelling persistent (>1 month)? → consider Morbihan disease or biofilm, especially in hyaluronic fillers.

🔑 Quick Management

Allergic Angioedema: Antihistamines ± corticosteroids ± Epinephrine (if airway risk)

Hereditary Angioedema: C1 esterase inhibitor / Icatibant

Post-Filler Swelling: Hyaluronidase if HA suspected and persistent

Rosacea-related edema (Morbihan): Isotretinoin ± antibiotics ± compression

Infectious: Broad-spectrum antibiotics

🧪 Labs to Consider (Case-Dependent)

CBC, ESR/CRP

C1 inhibitor level (if recurrent angioedema)

ANA, CK (if heliotrope suspected)

Kidney function + urine protein (if systemic edema)

🔬 Mini Quiz

1. A 45-year-old female presents with persistent non-pitting periorbital swelling, history of rosacea. Diagnosis? ➡️ Morbihan disease

2. Sudden lip swelling after seafood exposure? ➡️ IgE-mediated angioedema

3. Purple discoloration and pain 20 minutes after nasal filler? ➡️ Vascular occlusion secondary to filler

DermaDrill

🛡️ DERMATOLOGY EXAM SURVIVAL GUIDE

A high-yield, last-minute revision tool

---

⭐ 1. GOLDEN EXAM FORMULA FOR ANY CASE

Whenever you present or write an answer, ALWAYS follow this structure:

1️⃣ Definition

Short, clear, textbook-like.

2️⃣ Etiology / Pathogenesis

Keep it to 4–5 bullets.

3️⃣ Clinical Features

Use this exact template:

Primary lesion

Color

Surface

Margin

Distribution

Symmetry

Arrangement

Secondary changes

4️⃣ Differential Diagnosis (3–5)

Examiners LOVE DDs.

5️⃣ Investigations

CBC

LFT/RFT

KOH

Wood’s lamp

Dermoscopy

Biopsy (where? why?)

6️⃣ Management

Always stepwise:

1. General

2. Topical

3. Systemic

4. Procedural

5. Monitoring

6. Counseling

7️⃣ Red Flags

Show safety thinking.

---

⭐ 2. MAGIC PHRASES THAT GIVE INSTANT MARKS

Use these in vivas and written exams:

✔ “Dermatology is a visual science.”
✔ “I will describe the lesion systematically.”
✔ “My first differential is…”
✔ “To confirm, I will perform dermoscopy/biopsy/KOH.”
✔ “I will check mucosa, hair, nails, and lymph nodes.”
✔ “I will screen for systemic involvement.”
✔ “Early recognition of red flags is essential.”

---

⭐ 3. MUST-KNOW DIFFERENTIAL LISTS (EXAM FAVORITES)

🔸 Hypopigmented lesions

Vitiligo

IGH

Pityriasis alba

Tinea versicolor

Leprosy

Nevus depigmentosus

🔸 Papulosquamous disorders

Psoriasis

Pityriasis rosea

Lichen planus

Seborrheic dermatitis

Secondary syphilis

Tinea corporis

🔸 Vesiculobullous

Pemphigus vulgaris

Bullous pemphigoid

Dermatitis herpetiformis

IgA bullous dermatosis

SJS/TEN

🔸 Annular lesions

Tinea corporis

Granuloma annulare

Erythema multiforme

Subacute cutaneous lupus

Erythema annulare centrifugum

🔸 Targetoid lesions

EM major

Stevens-Johnson

Fixed drug eruption

Urticaria multiforme

🔸 Palm/sole lesions DD

Syphilis

Tinea manuum

Eczema

Palmoplantar psoriasis

Hand-foot-mouth disease

---

⭐ 4. HOW TO PRESENT A CASE LIKE A TOPPER

Use this exact script:

“This patient has a well-defined/ill-defined ___ lesion, ___ in color, with __ surface, located on ___. The distribution is ___ and arrangement is ___. Hair, nails, and mucosa are (normal/abnormal). No systemic symptoms. My differentials are ___.”

Examiners LOVE structured descriptions.

---

⭐ 5. EXAM “SIGN” LIST – SCORE BOOSTERS

Know these 20 signs — guaranteed questions:

Auspitz sign

Kobner phenomenon

Wickham striae

Target lesions

Apple-jelly nodules

Pseudo-Hutchinson sign

Nikolsky sign

Bulla spread sign

Darier sign

Candle grease sign

Herald patch

Tyndall effect

Hutchinson tooth

Raccoon eyes (amyloidosis)

Buttonhole sign (NF)

Hair pull test

Exclamation mark hairs

Dot-in-hole sign (scabies)

Fitzpatrick phototype

“Inverted champagne bottle” (lipodermatosclerosis)

Know these = automatic marks.

---

⭐ 6. OSCE SURVIVAL RULES

1. Never hesitate to TOUCH the lesion

(except bullous disorders)

2. Always check:

Hair

Nails

Mucosa

Lymph nodes

Sensory loss (if hypopigmented)

3. Say your DIFFERENTIALS first, not last

Shows diagnostic reasoning.

4. Always give ONE investigation you would do immediately

e.g., KOH, dermoscopy, biopsy.

5. End confidently:

“I would like to confirm with biopsy from ___ (exact site).”

---

⭐ 7. THEORY EXAM HACKS

Start every answer with a definition.

Use headings and boxes — examiners reward organised answers.

Draw simple diagrams (hair cycle, blister formation, psoriatic pathway).

Avoid long paragraphs; stick to point form.

Add 2 recent updates (e.g., biologics, JAK inhibitors).

End with complications or follow-up → bonus marks.

---

⭐ 8. HOW TO THINK IN VIVA

When you don’t know an answer: Say: “I am not completely sure, but the closest possibility is ___ because ___.”

Never say “I don’t know.”
Examiners give marks for thinking processes, not perfection.

---

⭐ 9. MUST-KNOW EXAM CASES

Be ready to handle these 15:

Psoriasis

Lichen planus

Pityriasis rosea

Seborrheic dermatitis

Scabies

Tinea

Vitiligo

Melasma

Acne & rosacea

Pemphigus/Pemphigoid

Leprosy

SJS/TEN

Lupus

Vasculitis

Drug eruptions

If you master these → you PASS with distinction.

---

⭐ 10. 1-PAGE ULTRA-SHORT REVISION (Save this)

Describe the lesion

Give 3 DDs

State 3 investigations

State stepwise management

Add red flags

Mention follow-up

Done.