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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 |