Extensor versus flexor skin surfaces: skin over the extensor surface is thicker and darker in color. This is designed to withstand trauma which is more likely to occur with extension movements than with flexion movements.
Rash variations: we included few classic pictures of various rashes, but in your free time try to look for other variations online. This can help you on exam. Just as humans, of the same Homo sapiens species, look different from one another, rashes of the same condition can look different too. If you Google search for atopic dermatitis or lichen planus, you will be amazed at how many variations you can find.
Fluid-filled blisters b
13.1 Skin Infections (Folliculitis, Furuncles, Carbuncles, Skin Abscess, Paronychia, and Hidradenitis Suppurativa)
Differential dx: Bathtub folliculitis due to Pseudomonas. The lesions typically start below the neck (bathtub water submersion pattern). Treatment is avoidance or chlorination of hot tub. In severe cases use ciprofloxacin.
Folliculitis can progress to small collection of infected material known as furuncle. When several furuncles come together to form a larger pus collection, it becomes a carbuncle, and a skin abscess forms.
Background: Cutaneous herpes simplex virus (HSV-1 or -2) can be acquired through contact with infected herpes genitalia or cold sores (e.g., dentist gets exposed to patient’s oral lesions). It can occur as a result of self-infection, too.
Background: After getting chicken pox (primary varicella zoster virus infection), the virus can remain dormant in sensory nerve ganglia for years. Precipitating factors such as immunosuppression can lead to reactivation of virus and eruption of rash along a sensory nerve root distribution.
Indication for postexposure prophylaxis in patients who lack immunitya
Airborneb + contact precautions
Postexposure prophylaxis is recommended with two doses of zoster vaccine. Since it is a live vaccine, it is contraindicated in newborns, pregnant, or immunocompromised individuals. In these patients, use varicella zoster immune globulin instead.
Unilateral facial nerve paralysis with painful vesicles in auditory canal and/or external ear
Any of “ + clovir”.a If resistant, use foscarnet.
Any of +clovira
Any of +clovira
Presentation: Scattered papules and/or pustules ± underlying erythema found particularly in digital webs (interdigital space of hands or feet), palms, and intertriginous areas. These are very itchy. Look for history of exposure to patients with similar symptoms. Patients with HIV can develop extensive scabies with severe crusting, known as Norwegian scabies.
Definition: Intertrigo is an umbrella term for inflammatory conditions located in skinfolds (intertriginous areas). It can develop due to mechanical skin-on-skin friction/irritation alone or become complicated by superimposed fungal or bacterial infection.
Presentation: Erythematous lesions that can be painful and pruritic. Secondary spongiosis can occur (formation of vesicles and pustules which can weep, ooze, and crust). Intertrigo can also present as diaper rash in children.
Premium Wordpress Themes by UFO Themes
WordPress theme by UFO themes