Diagnose This Zebra
What started as a roundish macular skin lesion became a painless eschar in a febrile 15-year-old cancer patient who was immunocompromised and immunosuppressed. What is your diagnosis? Ulcerated Skin Lesion Covered by Eschar in Young Cancer Patient By Ted Rosen, MDProfessor of Dermatology, Baylor College of Medicine, Houston, Texas CASE HISTORY A 15-year-old male patient with known B-cell acute […]
Diagnose This Zebra
A 45-year-old Caucasian female with a history of chronic eczema presents with red, pruritic eczematous patches with xerotic scale on the hands, feet, elbows, knees, and ankles, refractory to treatment. What is your diagnosis? Eczematous Patches With Xerotic Scale By Melissa Cheng, BS,1 Cynthia Lazzaro, DO,2 Samir Patel, MD3 1Western University of Health Sciences, College […]
Diagnose This Zebra
What started as a tender, erythematous papule in a man’s chin, eventually eroded, forming a deep, intermittently painful and tender-to-the touch ulceration. The patient had not been to the dentist in close to three years due to the COVID-19 pandemic. What is your diagnosis? Hole in the Chin By Ted Rosen, MD, FAADProfessor of Dermatology, Baylor […]
Diagnose This Zebra
A 60-year-old white man presents with excoriated and crusted papules and nodules on the face.Self-treatment with topicals has not offered relief. He has an unremarkable patient history. What’s your diagnosis? Intense Pruritic Facial Eruption By Ted Rosen, MDProfessor of Dermatology, Baylor College of Medicine, Houston, Texas CASE HISTORY A 60-year-old white man presented for evaluation […]
Diagnose This Zebra: A Differential Diagnosis Case
Description: A 29-year-old man with psoriasis presents years after achieving good control with supposed “chigger bites” after a camping trip. Three months later, the itching bumps persisted and included scrotal and peripheral nodules. What’s your diagnosis? Psoriasis, Insect Bites, and Prurigo Nodularis… or Is It? By F. Hall Reynolds, MDDermatologist practicing in Chattanooga, Tennessee CASE […]
Diagnose This Zebra: A Differential Diagnosis Case
A 74-year-old woman treated for presumed impetigo on the thumb did not respond initially to a course of clindamycin nor treatment 8 days later with doxycycline. What’s your diagnosis? Honey-Crusted Erosion on Thumb By Frank Hall Reynolds, MDChattanooga Skin and Care Clinic, Chattanooga, Tennessee CASE HISTORY A 74-year-old woman was being evaluated for abnormal moles […]
Diagnose this Dermatoscopic Zebra
A questionable leg lesion is found in a patient with a history of melanoma. Dotted vessels, shiny white lines, and peripheral tan structureless areas raise concern for melanoma. Which dermoscopic feature has prognostic value? Diagnosis vs. Prognosis of Melanoma By Zaeem Nazir, BA, and Ashfaq A. Marghoob, MD Dermatology Service, Department of Medicine, Memorial Sloan […]
Diagnose This Zebra: A Differential Diagnosis Case
A 20-Year Intermittent, Mildly Pruritic Eruption A healthy 42-year-old female patient presents with a two-decade history of an intermittent, mildly pruritic eruption involving the anterior chest. Self-treatment has failed. Patient history and physical exam are non-contributary. What’s your diagnosis? By Ted Rosen, MD Professor of Dermatology, Baylor College of Medicine, Houston, Texas CASE HISTORY An […]
DIAGNOSE THIS ZEBRA: A DIFFERENTIAL DIAGNOSIS CASE
Leaf-like Areas vs Streaks and Pseudopods A patient in her fourth decade presents with a mole she first noticed 2 years ago. The mole has variegated color, border irregularity, and asymmetry. Initial impression is melanoma, but is it? By Zaeem Nazir, MD, and Ashfaq A. Marghoob, MD Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer CenterNew […]
DIAGNOSE THIS ZEBRA: A DIFFERENTIAL DIAGNOSIS CASE
Large, Painless, Thin-Walled Blister Ruptures, Then Many Smaller Bullae Appear By Ted Rosen, MD, FAAD CASE HISTORY A 78-year-old male being treated for rheumatoid arthritis with adalimumab and low dose prednisone (10 mg daily) developed a solitary painless red plaque on the abdomen, which, in 12 hours, evolved into an eschar. At that point, the […]