Dermatology Flashcards
Why should Actinic Keratosis be treated?
It may progress to SCC
First line tx for Rosacea?
Metronidazole, TCN 2
Where are 90% of Basal cell lesions found on the body?
On the head and neck
Purple, pruritic, polygonal, papule on PE should make you think of?
Lichen Planus
ABCs of Melanoma?
Asymmetry, border, color, diameter, elevation/irregularity, evolving
Positive Auspitz sign should make you think of?
Psoriasis
What is the key indicator of the prognosis for melanoma?
Thickness of lesion
Tx for Melanoma?
Wide Local Excision
Waxy Stuck On appearance should make you think of?
Seborrheic Keratosis
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
Satellite lesion should make you think of?
Candida Diaper Rash
Coin shaped plaques should make you think of
Nummular Eczema
Atopic Dermatitis?
Allergic, Flexure creases
Candidiasis?
Diabetic
Lichen Planus?
Pruritic Polygons
Psorasis?
Silvery scaled papules/plaques
Strawberry tongue, Swollen LN, Palmer erythema, Conjunctivitis?
Kawasaki Dz
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
Pt with flaky skin in the nasolabial folds and in her hair. What is the most likely dx?
Seborrheic Dermatitis
How do you treat Stasis Dermatitis?
Compression stockings
Tapioca blisters should make you think of?
Dyshidrosis, these are usually on the hands and feet.
Giant Cells on a Tzank Smear>
Herpes Simplex VIrus
Tx Lichen Simplex Chronicus?
Stop scratching it
Herald Patch?
Think Ptyriasis Rosea
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.