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What's Your Diagnosis?
CT head non-contrast axial and coronal views during first visit to emergency department are shown
What's Your Diagnosis?
A Rapidly Enlarging Headache
09/20/2025
Justin Lien, BS; Ananya Narasimhan, BS; Nicholas Basalous; Evan M. Masutani, MD, PhD; Mariam Fahim, DO
A 6-year-old boy with a past medical history of recurrent otitis media presented to an outpatient pediatrician for subacute new-onset headache and photophobia.
09/20/2025
WHAT'S YOUR DIAGNOSIS?
multiple coalescent small erythematous papules on the left rib cage
WHAT'S YOUR DIAGNOSIS?
Unilateral Rash in a Toddler
09/07/2025
Dana Simon, BS; Michelle L. Gallagher, DO
A 15-month-old girl with a 1-week history of a non-pruritic rash on the left arm and trunk was brought to the dermatologist by her mother.
09/07/2025
Photoclinic
Figure 1. An 8-year-old boy presents with symmetric bald patches since birth in the temporal area.
Photoclinic
Temporal Triangular Alopecia
08/30/2025
Shae Margulies, MD; Stephanie Ryan, MD
An 8-year-old boy presents with symmetric bald patches in the temporal area which have been present his entire life.
08/30/2025
Photoclinic
Pre (left) and Post-contrast (right) axial T1-weighted MR image
Photoclinic
A Rare Extra-Gonadal Sac Tumor Presenting as a Labial Mass in a Child
08/27/2025
Kevin Pierre, MD; Anaiya Meikle; Ana Ruzic Do, MD; Heather Liebe, MD; Ensar Yekeler, MD; Evelyn Anthony, MD; Marianna Rodero Cardoso, MD; Priya Sharma, MD
A previously healthy 2-year-old girl presented to the primary care physician with a right anterior labial mass.
08/27/2025
Photo Essay
steatocystoma multiplex located in the presternal area
Photo Essay
An Atlas of Lumps and Bumps, Part 45: Steatocystoma Multiplex
07/24/2025
Alexander K.C. Leung, MD, MBBS, FRCPC, FRCP; Benjamin Barankin, MD, FRCPC; Joseph M. Lam, MD; Kin Fon Leong, MD
Steatocystoma multiplex is a rare skin condition clinically characterized by multiple, asymptomatic, smooth, round, soft to firm, often freely movable, yellow or skin-colored papules and nodules.
07/24/2025
Photoclinic
Rash on a baby's back
Photoclinic
Ring Rash in an Infant: Unmasking Neonatal Lupus
07/21/2025
Aashir S. Siddique, BSc; Kripa S. Thakur, MD; Landon C. Barlow, BSc; Michelle L. Gallagher, DO
A 3-month-old boy presented to the dermatology clinic with large erythematous plaques that appeared in the first few weeks of life, localized to the face, back, and torso.
07/21/2025
photoclinic
button battery xray
photoclinic
Early Recognition and Management of Lithium Battery Ingestion in a 15-Month-Old
07/07/2025

Anna Yoon, OMS IV1 • Yuna Seo, OMS II1 • Joy Zarandy, DO2

Anna Yoon, OMS IV1 • Yuna Seo, OMS II...
A 15-month-old boy was brought to an urgent care center by his father for suspected ingestion of a button battery.
07/07/2025
Photo Essay
Lichen Striatus
Photo Essay
An Atlas of Lumps and Bumps, Part 38: Lichen Striatus
07/07/2025
Alexander K.C. Leung, MD, MBBS, FRCPC, FRCP; Benjamin Barankin, MD, FRCPC; Joseph M. Lam, MD; Kin Fon Leong, MD
This article is part of a series describing and differentiating dermatologic lumps and bumps. In Part 38, Leung and colleagues describe lichen striatus. To access previously published articles in the...
07/07/2025
Photo Essay
The blisters/bullae contain clear fluid initially but may become hemorrhagic with time.
Photo Essay
An Atlas of Lumps and Bumps, Part 51: Diffuse Cutaneous Mastocytosis
06/23/2025
Alexander K.C. Leung, MD, MBBS, FRCPC, FRCP; Benjamin Barankin, MD, FRCPC; Joseph M. Lam, MD; Kin Fon Leong, MD
Diffuse cutaneous mastocytosis, a rare but potentially fatal form of cutaneous mastocytosis, accounts for approximately 1% to 5% of pediatric cutaneous mastocytosis cases
06/23/2025
Photo Essay
Figure 2
Photo Essay
An Atlas of Lumps and Bumps, Part 41: Congenital Melanocytic Nevi
05/19/2025
Alexander K.C. Leung, MD, MBBS, FRCPC, FRCP; Benjamin Barankin, MD, FRCPC; Joseph M. Lam, MD; Kin Fon Leong, MD
This article is part of a series describing and differentiating dermatologic lumps and bumps. In Part 41, Leung and colleagues describe congenital melanocytic nevi. To access previously published articles...
05/19/2025