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Cellulitis

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Cellulitis

Skin and subcutaneous tissue

Congenital disorders

Xeroderma pigmentosum

Disorders of pigmentation

Albinism

Infectious, immunologic, and inflammatory disorders

Vitiligo
Cellulitis
Erysipelas
Folliculitis
Impetigo
Necrotizing fasciitis
Atopic dermatitis
Contact dermatitis
Lichen planus
Psoriasis
Erythema multiforme
Pityriasis rosea
Stevens-Johnson syndrome
Urticaria
Bullous pemphigoid
Epidermolysis bullosa
Pemphigus vulgaris

Integumentary disorders

Alopecia areata
Seborrhoeic dermatitis
Telogen effluvium
Onychomycosis
Acne vulgaris
Hidradenitis suppurativa
Rosacea

Neoplasms

Actinic keratosis
Vascular tumors
Skin cancer

Oral disease

Aphthous ulcers

Traumatic and mechanical disorders

Burns
Frostbite
Pressure ulcer
Sunburn

Skin and subcutaneous tissue pathology review

Pigmentation skin disorders: Pathology review
Bacterial and viral skin infections: Pathology review
Papulosquamous and inflammatory skin disorders: Pathology review
Vesiculobullous and desquamating skin disorders: Pathology review
Viral exanthems of childhood: Pathology review
Acneiform skin disorders: Pathology review
Skin cancer: Pathology review

Key Takeaways

Cellulitis is a localized infection and inflammation of the skin and subcutaneous tissue. It most commonly affects the lower extremities, particularly the legs. Cellulitis is usually caused by Streptococcus pyogenes or Staphylococcus aureus. If left untreated, it can lead to sepsis.

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Flashcards

Cellulitis

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Questions

USMLE® Step 1 style questions USMLE

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A 36-year-old man presents to the emergency department for evaluation of a rash on the right forearm. The patient was recently admitted to the hospital for pain-control in the setting of nephrolithiasis. He recalls, “After I left, I was feeling fine, then the next day my arm started hurting, and I noticed a red rash near the site where I had my IV.” He is otherwise healthy and does not take any medications daily. Temperature is 38.0°C (100.4°F), pulse is 110/min, respirations are 14/min, and blood pressure is 119/77 mmHg. Physical examination demonstrates a well demarcated erythematous, warm, and painful rash over the anterior aspect of the right forearm without fluctuance. Infection with which of the following organisms is most likely responsible for this patient’s cutaneous findings?