Dermatology Flashcards
Psoriasis vs. Eczema: How to Tell the Difference
eczema is usually “characterized by poorly demarcated red, dry areas with fine scale,” while psoriasis appears as “red, well-circumscribed lesions (called plaques) with heaped-up, white scaling.
Drugs that trigger psoriasis
Lithium, ACE inhibitors
Antibiotic - Staph. aureus Vs Strep Vs if hx hot tub use
Most common organism causing folliculitis is Staph. aureus Effective antibiotic is Oral Flucloxacillin
Effective antibiotic for Strep is Oral Phenoxymethylpenicillin If penicillin allergy - Clarithromycin
If hx hot tub use - think of pseudomonas aeruginosa - treat with Ciprofloxacin
Eczema herpeticum
Atopic eczema becomes secondarily infected by Herpes Simplex.
- multiple clusters of small vesicles on areas of eczema
- fever, irritability
Erythema migrans Vs Erythema multiforme and other Erythema
DE 3030 - question number
MULTIple target lesions - erythema MULTIforme - SNAP (mnemonic for drugs causing): Sulphonamides, NSAIDs, Anticonvulsants, Peniciilin
Erythema marginatum - - pink rings on torso (or) inner surfaces of the limbs - Rheumatic fever
Erythema nodosum - - tender nodules on shins (IBS, Sarcoidosis)
Erythema infectiosum - - slapped cheek syndrome (Parvovirus B19)
Erythema Ab Igne - Elderly who sits too close to heat
Tinea capitis Vs Psoriasis scalp vs Eczema scalp
DE 0780 - reference question
Firm lesion with a central depression
DE 3210
When not to give antivirals for herpes labialis
DE 4450
Bullous Vs non-bullous impetigo
DE 3000
Avoiding wet work can improve?
Improves irritant contact dermatitis
Doesn’t improve psoriasis CY2822
Itching skin folds, breast creases/under the breast. Diagnosis and Rx?
Scabies
Rx-Permethrin
IN 1130 for more details with image.
Ring worm aka
Tinea corporis DE 4130
Pemphigoid gestationis vs PUPPP (Pruritic Urticarial Papules and Plaques of Pregnancy)
DE 2170
Pemphigoid gestationis
- related to pregnancy
- erythematous urticarial (itching) plaques initially around the umbilical area, then spreads to the trunk and upper limbs.
- vesicles and tense bullae on some of the plaques, and a few older lesions show post-inflammatory hyperpigmentation.
PUPPP
- also pruritic (itching)
- also related to pregnancy
- BUT typically does not present with vesicles or bullae.
Small, drop shaped, salmon pink papules
GUTTATE PSORIASIS
- typically following a streptococcal throat infection
Question DE 4333
Actinic keratosis treatment
Read GEMS topic and question code DE 3010
