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Step III
Step III - Derm 2
Question | Answer |
---|---|
Rx tx for cellulites | Start w/ PO Antibx if severe (septic) then IV ox/naf/cefazolin |
Etio of cellulites | Staph and strep |
Tx for folliculitis | Topical mupirocin |
Tx for furuncle/carbuncle | Systemic diclox/cefadroxyl\ |
Pt w/ DM c/o bullae on skin, high fever, extreme pain, and palpable crepitus under skin | Necrotizing fasciitis |
MCC Necrotizing fasciitis | Clostridia and strep (staph |
Diagnostic studies for Necrotizing fasciitis | XR, CT, MRI |
Most accurate test and tx for necrx fasciitis | Surgical debridement |
BEST INITIAL STEP for Necrotizing fasciitis | Surgery (not radiologic studies) |
Name the different beta lactam and beta lactamase combos used to treat Necrotizing fasciitis | Amp/sulbactam; ticar/clavul; piper/tazobac |
If cx grow strep pyo for necrx fasciitis then rx tx | Clinda + PCN |
What is the tx for paronychia | Incision + anti-staph antibx |
What is the best initial test for HSV and what does it show | Tzanck smear; multinucleated giant cells |
Most accurate test for HSV | Viral cx (1-2 days) |
Tx acyclovir resistant HSV | Foscarnet |
When should chicken pox be treated w/ anti-virals | Immunocompromised kid or infx occurs in adulthood |
What are the sequelae of varicella | PNA, hepatx, disseminated dz |
In what pts would you expect shingles to erupt | Elderly, HIV, leukemia, lymphoma, pt on steroids |
What is the best initial test for herpes zoster | Tzanck |
Most accurate test for herpes zoster | Viral cx |
Tx for elderly w/ severe pain from herpes zoster shingles | Steroids |
Tx that is best efficacy for preventing post herpetic neuralgia | Rapid admin Acyclovir |
most effective tx for post herpetic neuralgia from shingles | Gabapentin |
other rx tx for post herpetic neuralgia | TCA, topical capsaicin |
non immunized adults should also receive what in addition to rx tx for varicella | Varicella Ig w/i 96hrs exposure |
What is the best initial test for warts | None done routinely |
Painless tx for warts | Imiquimod |
Which wart tx is teratogenic | Podophyllin |
What is the best initial tx for 1 and 2 syphilis | IM PCN |
Tx for 1 and 2 syphilis if PCN allergy | PO doxy x2wks |
What is the best initial test for 1 syphilis | Dark field microscopy |
Generalized copper colored rash mostly intense on palms and soles. Mucous pathc, alopecia areata, condyloma lata. Dx | 2 syphilis |
Most sensitive test for 2 syphilis | RPR and VDRL |
Itchiness in web spaces of hand as well as penis and breast | Scabies |
Norwegian scabies mostly occurs in what type of pts | HIV |
Most accurate test for scabies | Mineral oil to area and scrape out bug |
Tx for scabies | Permethrin |
Tx for Norwegian scabies | PO ivermectin |
Tx for pediculosis | Permethrin or OTC pyrethins |
Difference b/t pediculosis and lice | Larger and rust colored (eating blood) |
What is the rash like in Lyme dz | CENTRAL clearing bulls eye and > 5cm diameter |
Tx for Lyme | PO doxy, amox, or cefuroxime |
If pt w/ Lyme not tx then what is most likely sequelae | Joint dz >> neuro > cardio |
Pt w/ nasal packing, retained sutures, tampon use. Fever >102, desquamating rash, systolic BP <90, vomiting, involvement mucous membranes eye, mouth, genitals | TSS |
Dz where creatinine, CPK, low platelets, CNS involvement, rash, fever >102 | TSS |
Tx for TSS | IVF, pressors (dopa), ox/naf/cefazolin +/- vanc/linezolid |
(+) Nikolsky, nL BP, no organ involvement, epidermal layer only, not triggered by drugs | SSSS |
Tx for SSSS | Transfer to burn unit; give ox/naf or other anti-staph rx |
Contact w/ livestock, wool sorter, bioterrorism. Papule that turns in central necrotic lesion | Anthrax |
Most accurate test for anthrax | Gram stain and cx |
Tx for anthrax | Cipro or doxy |
Tx of melanoma | Excision full thickness |
Tx to reduce recurrence of melanoma | IFN |
Tx fo SK | Liquid nitro or curettage |
What is the best initial tx for AK | Sunscreen |
Tx for SK | 5-FU, imiquimod, topical retinoic acid, curettage |
Most accurate test for squamous cell CA | bx |
Tx for sq cell CA | removal |
Shiny pearly most common skin CA | basal cell |
Most accurate test for basal cell | Punch or shave bx |
At what CD count would you expect Kaposi’s sarcoma to erupt in HIV pt | < 100 |