18 - Dermatology Patholoy

Vitiligo incidence

equal incidence in all types of skin colors

Vitiligo family history incidence

20-30% report disease in first and second degree relatives

Vitiligo PMHx

often assoicated with autoimmune disorders

Vitiligo psych/social hx

can affect the patient psychologically and therefore impact social hx

Vitiligo physical exam

depigmentation, clear demarcations (generalized, acral or acrofacial, localized, segmental)

Tinea Versicolor (who is most likely)

adolescents and young adults

Tinea Versicolor (physical exam)

fair-skinned = scaling brown macules

skin of color = hypopigmented macules

trunk and extremities

Ringworm

Alopecia Areta

Herpes Zoster (HPI)

burning pain associated prior to onset of rash

Herpes Zoster (PMHx)

Hx chicken pox (immunocompromised? HIV?)

Herpes Zoster (HCM)

Hx of vaccine (varicella or zoster)

Herpes Zoster (physical exam)

vesicles following a dermatomal pattern

*look for Hutchinson's sign

Contact dermatitis

Contact dermatitis (from pants button)

Herpes Simplex

Folliculitis

Pseudofolliculitis Barbae

Carbuncle

Furuncles

Skin Tags

Sebaceous cyst

Scabies

Tick bite

ask about how long it was on them, if it was engorged, and what type of tick it was

Erythema Migrans (Lyme)

tick exposure, outdoor activities/occupation

rash not always present, >7 cm

Rosacea

Psoriasis

extensor surfaces (knees and elbows)

Pityriasis Rosea

presents with herad patch

Numular dermatitis

Atopic dermatitis

commonly occurs on face, hands, feet, flexor surfaces of elbows/knees

What is the atopic triad?

asthma, eczema, allergies

family hx of eczema, asthma, hay fever

Tinea Curtis

Acanthosis Nigricans

Keloid

overgrowth outside the confines of cutaneous injury

location = ears, anterior chest, upper back, and shoulders

Keloid Hx

Hx of cutaneous injury with scar overgrowth

Fam Hx - may have familial tendency

More common in patient with skin of color

Erythema Nodosum

Vasculitis

Janeway Lesions

sign of acute, bacterial endocarditis

Kaposi Sarcoma

painless purple lesions

legs, feet, and face

can occur in mucosal surface

What is the cause of Kaposi Sarcoma?

human herpes virus 8

Kaposi Sarcoma Hx

- latrogenic (hx of immunosuppressive therapy)

- HIV/AIDS infection