1. Dermatology Basics
David Surprenant, MD

2. Common Conditions

4. Cellulitis
Common bacterial infection of the deep dermis and subcutaneous tissue
Characterized by:
Erythema
Pain
Warmth
Swelling
Often have:
Fever
Chills
Malaise
Leukocytosis
Virtually never occurs bilaterally
If purulence, swab it for culture
Otherwise swab will only grow normal skin flora

6. Stasis Dermatitis
A type of eczema that occurs in setting of venous insufficiency
Obesity, CHF, DVT, injury, etc.
Pruritus, aching, throbbing, discomfort
Can be unilateral (often bilaterally)
Can be warm to the skin
Will not have other signs of infection, i.e.
Tachycardia
Leukocytosis
Fever
Will treat with topical corticosteroids
Mention vehicle importance
Compression is key – often will defer to vascular surgery if there is an active clot; also need to consider cardiac status prior to compression

9. Hidradenitis Suppurativa
Inflammatory disorder
Follicular occlusion -> rupture -> inflammation
Occasionally bacterial superinfection
Onset after puberty
Treatment:
Weight loss & smoking cessation
Antibiotics (primarily for anti-inflammatory)
TNF-alpha inhibitors
Surgery
Swab of area will grow bacteria – unlikely to be pathogenic or clinically significant
These spots look infected—patient again will have no fever, chills, ns etc; can have leukocystosis

10. Ask the patient if this is new or changing
Good day, bad day, average day for your skin?
Often followed by outside dermatologist

12. Psoriasis Chronic inflammatory condition Think pink/red, scaly plaques
Commonly involved areas:
Occipital scalp
Umbilicus
Elbows
Knees
Treatment:
Topicals vs systemic medication
Can have deforming psoriatic arthritis

14. Erythroderma Erythema & scale >90% BSA Causes: Treatment: Psoriasis
Atopic dermatitis
Drug reactions
Idiopathic
CTCL
Treatment:
Fluid, electrolyte, and thermal regulation
Wet wraps

16. Pyoderma Gangrenosum Inflammatory condition Non-infectious
Overactive neutrophils
Non-infectious
Diagnosis of exclusion (biopsy will not be diagnostic)
Surgery & debridement makes this condition worse!
Pathergy
Consider if non-healing wound
Association with inflammatory bowel disease
Treatment:
Immunosuppression

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