Dermatology Flashcards by Iain Black

Why should Actinic Keratosis be treated?

It may progress to SCC

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First line tx for Rosacea?

Metronidazole, TCN 2

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Where are 90% of Basal cell lesions found on the body?

On the head and neck

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Purple, pruritic, polygonal, papule on PE should make you think of?

Lichen Planus

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ABCs of Melanoma?

Asymmetry, border, color, diameter, elevation/irregularity, evolving

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Positive Auspitz sign should make you think of?

Psoriasis

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What is the key indicator of the prognosis for melanoma?

Thickness of lesion

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Tx for Melanoma?

Wide Local Excision

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Waxy Stuck On appearance should make you think of?

Seborrheic Keratosis

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Five year old presents in January with a red itchy rash behind his knees on the flexor surfaces of the elbows. What is the most likely Dx?

Atopic Dermatitis

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Satellite lesion should make you think of?

Candida Diaper Rash

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Coin shaped plaques should make you think of

Nummular Eczema

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Atopic Dermatitis?

Allergic, Flexure creases

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Candidiasis?

Diabetic

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Lichen Planus?

Pruritic Polygons

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Psorasis?

Silvery scaled papules/plaques

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Strawberry tongue, Swollen LN, Palmer erythema, Conjunctivitis?

Kawasaki Dz

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30 year old femal with pustules on her face that spare the vermillion border. In her Hx she has been using topical steriods. What is the most likely dx?

Perioral dermatitis

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Pt with flaky skin in the nasolabial folds and in her hair. What is the most likely dx?

Seborrheic Dermatitis

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How do you treat Stasis Dermatitis?

Compression stockings

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Tapioca blisters should make you think of?

Dyshidrosis, these are usually on the hands and feet.

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Giant Cells on a Tzank Smear>

Herpes Simplex VIrus

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Tx Lichen Simplex Chronicus?

Stop scratching it

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Herald Patch?

Think Ptyriasis Rosea

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How do you treat Pityriasis Rosea?

Reassurance

Pt with a Hx of hermes now presents with a Target Lesion? What is up?

Erythema Multiforme

Rhinophyma should make you think of dx?

Acne Rosacea

Silvery scales should make you think of?

Psoriasis

Tear drop lesion after a course of strep throat should make you think of what?

Guttate Psoriasis

Fever and malaise, Rash starts on Trunk and face, spreads to extremities, become vesicles, then crust over and fall off. "Dew Drop on a Rose Petal"?

Varicella

Are Lesions from Psoriasis Typically found on the Flexor or Extensor Surfaces?

Extensor

First line tx for Tinea Corporis?

Topical Azoles

Fist line tx for Tinea Capitus?

Griseofulvin--->Antifungal

Most common organism responsible for Cellulitis?

Strep and Staph

Pitting nails are associated with?

Psoriasis

Nummular Eczema is most like what other dermatological disorder?

Atopic Dermatitis

Honey colored crusts should make you think of what diagnosis?

Impetigo

What 2 herpes viruses are most responsible for condyloma accuminata

HSV 6 and 11

A double comedone is indicitave of what dx?

Hidradentis Suppurativa

Best tx for Molluscum contagiosum

Self limiting but can be removed

Best tx for seborrheic keratosis?

Benign, usu no need to treat unless bothersome and can remove

Hyperpigmented velvety plaques should make you think of?

Acanthosis Nigricans

Melasma is most often found in what pt population?

Women of childbearing age

Extremely pruritic lseions with burrows in runs should make you think of what?

Scabies.

Slapped Cheek appearance?

Erythema Infectiosum, 5th disease, due to Parvovirus B 19

What is the first step in treating Atopic Dermatitis?

Beh modifications, Reduce bathing, only use soap on face and genitals, use natural breathable fabrics.

Tx for Brown Reculse Spider Bite?

Debridement, the venom causes tissue necrosis

Salmon colored scales?

Psorasis

Depigmented patches of stkin should make you think of ?

Vitiligo

Spaghetti and meatballs on KOH?

TInea Versicolor

Derm finding with insulin insensitivity?

Acanthosis Nigricans

Slow growing nodule with a central depressoin and pearly border?

BCC

Derm finidng with Asthma?

Atopic Dermatitis

Christmas tree pattern?

Pityriasis Rosea

Oval patches of hair loss?

Alopecia Areata

First line for genital warts?

Imiquimod (ALdara)

Pearly done shaped lesion with a central umbilication ?

Mulluscum Contagiousum

Best lab test for scabies?

Microscopic examination under oil emersion

Severe blistering mucocutaneous syndrome involving at least 2 mucous membranes, associated with Mycoplasma pneumonia and drugs such as phenytoin, phenobarbital, sulfa, and aminopenicillians?

Steven's-Johnson syndrome

Skin bx of Steven's-Johnsons?

Full thickness epidermal necrosis with mostly normal dermis. Uncomplicated usu resolves in a month

Rare life threateninng disease with widespread blistering and sloughing of skin, releate to drugs, immuniz, viral infxn, mycoplasma infxn, strep or syphilis

Toxic Epidermal Necrosis Presents with diffuse red sunburn-like skin with scattered target lesions and bullae

Tx for acne Comedones?

Benzoyl Peroxide | Retinoids

Papules and pustules (acne) tx?

Topical abx, oral abx

Nodules and cysts?

Isotretinoin | Potent teratogen and induces an elevation in triglycerides

Tx of Black Widow spider bites?

Ice to restrict spread of venom | Antivenom

Tx of Brown Recluse spider bites?

Supportive care, with severe necrosis, local wond care and abx needed

Most common cutaneous malignancy?

BCC

Malignancy of malanocytes?

Melanoma

Cellulitis is most common caused by

Group A strep and S Aureus

Tx for Impetigo?

Mupirocin ointment (Bactroban)

Rule of 9s for burns--> Adults

``` Adult" 9% head and neck 9% Upper extremity 18% Ant portion of trunk 18% post portion of trunk 18% Each lower extremity 1% perineum and genitalia ```

Rule of 9s---> Children

``` 18% head and neck 9% upper extremity 18% ant portion of trunk 18% post portion of trunk 14% each lower extremity 1% perineum and genitalia ```

Parkland forumula for fluid resuscitation for burns?

Uses Lactated Ringers 4ml/kg/% body surface area burned during the first 24 hours One half of total is given in first 8 hours and ther rest is given over 16 hours

Acquired brown pigmentation of the face and neck, occurs during the 2 and 3rd trimester of pregnancy or OCP. Symmetric macular eruption of brown hyperpigmentation noted

Melasma Will fade after pregnancy or stopping OCP Bleaching creams can be used

Urticaria are due to?

Histamine release mediated by IgE Acute: less than 6 weeks Chronic: Greater than 6 weeks

What 2 drugs typically cause a Fixed drug reaction?

TCN and cotrimoxaxzole

An uncommon, autoimmunee blstering disease that primarliy affects the elderly.

Bullous Pemphigoid due to IgG autoantibiodies Oral steriods until blistering stopts

Rosacea can progress to?

Rhinophymata

Most common cause of folliculitis?

S Aureus

Hot tub folliculitis?

Pseudomonas

Tx for Rosacea?

Oral TCN or Metronidazole, Maint therapy with TCN may be necessary

What needs to be monitored with Isoretinoin?

Triglycerides

High Fever followed by rash?

Roseola

12 year old boy falls on knees and a year later has white depigmented macules and patches on his knees?

Vitlitlgo A depigmenting disease due to destruction of melanocytes.