Derm I (to scratch or not to scratch) Flashcards
What is a positive nikolsky sign?
A blister that is formed in an area where you place a pencil eraser on the skin and gently twists back and forth.
What is pityriasis rosea?
Annular pink patch w/ scales that spreads to the torso that following cleavage lines of the upper torso in 10-14 days.
(Herald patch and Christmas tree pattern)
What are the 6 ps of Lichen Planus?
Pruritic Polygonal Planar Purple papules Plaques
What are some causes of drug eruptions?
Viral***
Drug-drug interactions
Environmental
What is dermatitis herpetiformis (aka duhring disease) related to?
Rare but persistent blistering skin condition related to celiac diease
What is the first line tx for dermatitis herpetiformis (aka duhring disease)?
Dapsone - sulphone antibiotic
Desquamation lesions: SJS and TEN is MCC by what?
Medications: antibiotics: sulfa based
Desquamation lesions: SJS and TEN is more commonly associated with what?
HIV infection
Before the desquamation lesions: SJS and TEN rashes appear there is usually a prodromal illness that is present for several days resembling what?
A URI or flu-like illness
What are you most worried about with desquamation lesions: SJS and TEN?
Fluid loss - hypoTN and dehydration
Infection
Hypothermia
Actinic keratosis (AKs) is typically related to what?
Exposure to sun
Most common locations of Actinic keratosis (AKs)?
Face, lips, ears, back of hands, forearms, scalp, or neck
What is a high risk associated with Actinic keratosis (AKs)?
May progress to SCC
What is the difference between Seborrheic Keratosis (SKs) and Actinic keratosis (AKs)?
Noncancerous
BIG, brown, black, or light tan
What do you want to consider when an adult pt presents with scabies?
Consider STI
What is a potential risk caused by a bite from a brown recluse?
Tissue necrosis
- surgical problem
- hemotoxic
A bite from a black widow will cause?
Neurotoxin - release of acetylcholine and norepi.
- medical emergency (very intense pain)
MC sx of a black widow bite?
Board-like abdominal cramp w/o abdominal tenderness
What does the rash look like in a pt who has been bitten by a tick carrying Lyme dx?
Erythema migrans - “bull’s eye”
What are the 3 end-organ systems to be concerned with in a pt who has been bitten by a tick carrying Lyme dx?
Dermatological, neurological, MSK
Best tx for a pt has been bitten by a tick carrying Lyme dx?
Doxycycline 100mg BID x 14 days
Is a bite from a hobo spider medical or surgical problem?
Surgical problem
What is epidermolysis bullosa?
Formation of blisters from trauma or friction
Tx for epidermolysis bullosa?
Peirce, drain, and dress blisters to promote healing
