Cellulitis
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Cellulitis
Skin and subcutaneous tissue
Congenital disorders
Infectious, immunologic, and inflammatory disorders
Integumentary disorders
Oral disease
Traumatic and mechanical disorders
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
Assessments
Flashcards
0 / 8 complete
USMLE® Step 1 questions
0 / 1 complete
High Yield Notes
16 pages



Flashcards
Cellulitis
0 of 8 complete
Questions
USMLE® Step 1 style questions USMLE
0 of 1 complete
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?
External References
First Aid
2024
2023
2022
2021
Cellulitis p. 487
Pasteurella multocida p. , 147
Streptococcus pyogenes p. , 134
Herpes simplex virus (HSV-1/HSV-2)
skin infections p. 487
Skin infections p. 487
Staphylococcus aureus p. , 133
skin infections p. 487
Staphylococcus pyogenes
skin infections p. 487
Streptococcus pyogenes (Group A strep) p. 134
skin infections p. 487
Viral skin infections p. 487
Summary
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.