Dermatology Flashcards
What is the most likely diagnosis for patient with multiple edematous, nonumbilicated papules on face, buttocks and extensors surfaces of extremities while sparing the trunk after a viral prodrome?
Papular Acrodermatitis of Childhood
Gianotti-Crosti syndrome
What infection is associated with papular acrodermatitis of childhood (Gianotti-Crosti syndrome) especially in immigrant children?
Hepatitis B
What is the most likely diagnosis for patient presenting with hypopigmented, minimally scaly papules and plaques on chest and back with skin scraping showing short blunt ended hyphae and clusters of spores?
Malassezia
dx sphaghetti and meatball on skin scarping
What is the etiology results in tender, erythematous pustules in clusters along the bathing suit area after spending time in hot tub?
Pseudomonas aeruginosa (Hot Tub Folliculitis)
What is the most likely diagnosis for patient presenting with flushing (facial erythema), telangiectasia, papules and pustules without comedones and can have associated conjunctivitis usually in response to spicy food/ alcohol/ exposure to hot or cold weather?
Rosacea
treat with topical antibiotics- metronidazole
What is the most likely diagnosis for patient with chronic dry hacking cough, eye manifestations (uveitis), lymphadenopathy, erythema nodosum, hepatosplenomegaly, and non-caseating granulomas?
Sarcoidosis
more common in African Americans
What is the most likely diagnosis for patient being treated with oral antifungal for skin fungal infection who develops diffuse, symmetrical eczematous rash?
Id Reaction (autoeczematization) (tx: continue antifungal and add corticosteroids; not an allergic reaction to antifungal)
What is the most likely diagnosis for patient with discrete drop like papules with pinkish hue on trunk and extremities sparing palms and soles and associated with fine, scaly appearance following streptococcal infection?
Guttate psoriasis
What is the most likely diagnosis for newborn with slighted raised solitary hairless yellowish tan plaque on scalp that feels firm with velvety and oily texture?
Sebaceous Nevus
tx: full thickness excision
How is head lice transmitted?
Via direct head to head contact with hair of infected individual
(less common by sharing combs, etc)
What is the most likely diagnosis for patient with asymptomatic, skin colored (or erythematous) annular plaques with firm border and central clearing located on extremity and not improved with topical antifungal?
Granuloma annulare
tx: self resolve, but can hasten with steroids
What is a potential treatment for Keratosis Pilaris (plugging of follicles by keratin located on upper arms and outer cheeks)?
can use topical creams containing lactic acid/ urea/ glycolic acid
What are possible side effects of isotretinoin used for acne? (5)
- photosensitivity
- arthralgia and myalgia
- bone marrow suppression
- hepatotoxicity
- pseudotumor cerebri (especially if given with tetracycline)
(requires blood work monitoring when using medication)
What is the most likely diagnosis for African American newborn with vesiculopustular lesions on scalp, neck, chin, and trunk that ruptures into hyperpigmented macules and wright stain of lesion shows numerous neutrophils?
Transient Neonatal Pustular Melanosis
What is the most likely diagnosis and etiology for patient presenting with 1 week of fever, fatigue and cough then develops mucosal eruptions of the oral mucosa, lips, conjunctiva, and anogenital areas with few lesions elsewhere?
Mycoplasma induced rash and mucositis
due to Mycoplasma pneumoniae
What is the most likely diagnosis for newborn presenting with multiple types of lesions including vesicles and bullae with eosinophilia but negative wright stain, warty/ verrucous lesions, and swirly brown bluish-gray pigmentation that first darkens then resolves and associated pegged teeth, nail changes and alopecia, and there is usually family history?
Incontinentia Pigmenti
What is the inheritance pattern of Incontinentia Pigmenti and what is a ophthalmic complication associated with it?
X-linked; retinal detachment
What is the most likely diagnosis for a prepubertal female with vaginal soreness, vaginal itching, sharply demarcated whitish thinned and inflamed skin with associated ulceration and hemorrhage that can extend into the perianal area?
Lichen Sclerosis
tx: topical steroid
What is the most likely diagnosis for patient presenting with glazed erythema of weight bearing surface of feet and toes with associated scaling and painful hyperkeratosis and fissures?
Juvenile Plantar Dermatosis
tx: emollient
What is most likely diagnosis for patient presenting with rapid progressing erythroderma with sloughing of skin especially with light touch (Nikolsky sign)?
TEN (toxic epidermal necrolysis)
What medications are associated with TEN (toxic epidermal necroslysis)?
Carbemazepine and Phenobarbital
What is the most likely diagnosis for patient presenting wtih isolated oval scaly pink patches (Herald patch) followed by multiple smaller scaly ovals distributed parallel to skin likes in Christmas tree pattern?
Pityriasis roscea
What is the most likely diagnosis of patient with Africa decent who has red hair, reddish brown skin and eyes, multiple pigmented nevi, freckles, nystagmus, photophobia and decreased visual acuity?
Rufus Oculocutaneous albinism
What is the most likely diagnosis for infant presenting with blistering skin in setting of little to no trauma (especially in neonate born to untreated GBS positive status mother)?
Epidermolysis bullosa
dx: skin biopsy
