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Derm Dx

David Ahn, MD, Nasir Aziz, MD, Amor Khachemoune, MD, FAAD, FACMS, Section Editor
Pavan Paka, MD, Usha Alapati, MD, Viktoryia Kazlouskaya, MD, PhD
A 66-year-old African American man was referred for the initial evaluation of a solitary, scrotal mass that was present for 1 year. The 1.5 x 1-cm, pink, exophytic nodule was pedunculated and progressively enlarging. He described the mass as painless without pruritus, discharge, bleeding, or surrounding skin and testicular involvement.
Eric J. Vondrak, DO, Philip R. Cohen, MD, Amor Khachemoune, MD, FAAD, FACMS, Section Editor
A 73-year-old African American man presented with a dark keratotic plaque on the anterior surface of his ear. He also had white patches with central erythematous areas on his face and scalp that had been present for several year
Nadeem Marghoob, OMS IV, Ashfaq A. Marghoob, MD, Amor Khachemoune, MD, FAAD, FACMS, Section Editor
A 58-year-old male dermatologist was on a flight home to New York after a trip to Sardinia, Italy, when he began to develop chills. The following day, he experienced fevers up to 103 °F, drenching sweats, and uncontrollable rigors.
Michael J. Visconti, BS, Arjun M. Bashyam, BA, Steven R. Feldman, MD, PhD, Amor Khachemoune, MD, FAAD, FACMS, Section Editor
A 16-year-old adolescent boy presented with a 2-year history of an expanding, dark eruption involving the chest, abdomen, axilla, and upper extremities. There was no pruritus or other associated symptom.
Yoo Jung Kim, AB, Philip R. Cohen, MD, Amor Khachemoune, MD, FAAD, FACMS, Section Editor
A 61-year-old man presented with an intermittent soft mass on his left forearm. Cutaneous examination revealed a soft, blue, 10 mm x 10 mm, compressible, painless, subcutaneous nodule on the proximal extensor aspect of his left forearm.
Shi Tang, BA, Philip R. Cohen, MD
A 23-year-old healthy man presented with yellow thickening on the palmar surface of his third, fourth, and fifth digits of both hands located at the metacarpophalangeal joints. 
Hannah J. Anderson, MD, Barbara B. Wilson, MD, Richard H. Flowers, MD, Amor Khachemoune, MD, FAAD, FACMS, Section Editor
In case two, a 62-year-old man was prescribed ingenol mebutate 0.015% for actinic keratoses on the temples, cheeks, nose, and helices. On day three of treatment, he presented with brightly erythematous patches on the malar cheeks and nose with numerous overlying minute superficial pustules.
Nili N. Alai, MD, FAAD, CPC-D, Section Editor: Amor Khachemoune, MD, FAAD, FACMS
A 29-year-old otherwise healthy Asian woman presented with refractory and debilitating bouts of itching limited to the right lateral knee, right lower leg, and right dorsal foot for more than 5 years’ duration.
Kim Nichols, MD, FAAD, Juliana Barresi, FNP-BC, Amor Khachemoune, MD, FAAD, FACMS
A 51-year-old white woman presented with multiple long-standing, asymptomatic, small, bluish subcutaneous papules on the bilateral cheeks and forehead. The patient reported that the bumps were painless and their appearance had become more visible over the past several months. She did not recount any precursor lesions in the involved areas. The patient reported that she had only had mild acne in the past and denied any other pertinent medical history or medications.
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