🧵 Must-Know Dermatology Images for USMLE Step 2 CK
(Part 2)
21/ Erythema Nodosum 🚨: Painful, red nodules typically on the shins, often related to systemic conditions.
(Part 2)
21/ Erythema Nodosum 🚨: Painful, red nodules typically on the shins, often related to systemic conditions.
22/ Vitiligo 🔳: Depigmented macules and patches, often symmetrical and involving areas like the face, hands, and genitalia.
23/ Bullous Pemphigoid 🔹: Tense, subepidermal blisters, often in elderly patients, with a negative Nikolsky sign.
24/ Pemphigus Vulgaris ❗: Flaccid blisters and erosions, often involving mucous membranes, with a positive Nikolsky sign.
25/ Dermatitis Herpetiformis 🌟: Intensely pruritic papules and vesicles, often on elbows, knees, and buttocks, associated with celiac disease.
26/ Alopecia Areata 🌀: Sudden, well-demarcated patches of hair loss, often with exclamation point hairs.
27/ Keloids ⚠️: Overgrown, raised scars that extend beyond the original wound boundaries.
28/ Melasma 🌞: Symmetric hyperpigmented patches, often on the face, associated with pregnancy or hormonal changes.
29/ Actinic Keratosis ⚡: Rough, scaly patches on sun-exposed skin, precancerous for squamous cell carcinoma.
30/ Erythema Chronicum Migrans 🎯: The hallmark of Lyme disease; expanding red rash with central clearing (bullseye appearance).
31/ Lupus (Chronic Cutaneous Lupus) 🦋: Discoid lesions, scaly, erythematous plaques that can lead to scarring.
32/ Nummular Dermatitis 🔵: Coin-shaped, itchy, red plaques, often on the legs.
33/ Contact Dermatitis 🖐️: Erythematous and vesicular lesions at the site of contact with allergens or irritants.
34/ Dermatofibroma 📏: Firm, hyperpigmented nodules, often with a central dimple when pinched (dimple sign).
35/ Pityriasis Versicolor 🌀: Hypo- or hyperpigmented macules with fine scaling, often on the trunk, caused by Malassezia species.
36/ Kaposi Sarcoma 💜: Purple, red, or brown lesions, often in immunocompromised individuals, such as those with HIV/AIDS.
37/ Necrobiosis Lipoidica 💉: Yellowish-brown patches with atrophic centers, often on the shins, associated with diabetes.
38/ Lichen Simplex Chronicus 🔄: Thickened, scaly plaques from chronic scratching or rubbing.
39/ Erythema Toxicum Neonatorum 👶: Common newborn rash, erythematous macules with central pustules, benign and self-limiting.
40/ Porphyria Cutanea Tarda 🌞: Blistering photosensitivity with hyperpigmentation and hypertrichosis, often on sun-exposed areas.
41/ Erythema Marginatum 🌸: Pink rings on the trunk and inner surfaces of the limbs, often associated with rheumatic fever.
42/ Ecthyma Gangrenosum ⚠️: Necrotic ulcers with a surrounding erythematous halo, often caused by Pseudomonas aeruginosa in immunocompromised patients.
43/ Candidiasis 🍄: Red, itchy rash with satellite lesions, commonly in warm, moist areas.
44/ Keratoacanthoma 🕳️: Rapidly growing, dome-shaped nodule with a central keratin-filled crater.
Malar Rash (Butterfly Rash) 🦋: Erythematous rash over the cheeks and bridge of the nose, sparing the nasolabial folds, characteristic of systemic lupus erythematosus.
Prepare well and good luck! 🌟 #USMLE #MedEd #Dermatology #Step2CK
Prepare well and good luck! 🌟 #USMLE #MedEd #Dermatology #Step2CK
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