Case Studies

A 9-year-old boy was seen for follow-up of a neck mass noted several years earlier. He first presented with this finding at aged 3 years, when during an otherwise unremarkable examination, he became upset, and a protuberant swelling was noted in the anterior aspect of the right side of his neck. What's the diagnosis?

William A. Frese, MD, MPH

An 11-year-old boy presented to the emergency department complaining of left testicular pain for 2 days, described as intermittent and stabbing, which ranged between 5 and 8 of 10 in intensity. Read the full case to see if you can correctly diagnose the patient.

Newborn with midline neck lesion | Image Credit: Author provided

A 4-day-old boy with a midline neck lesion was born at term by normal vaginal delivery. After birth, the midline lesion had the configuration of a linear cleft with a cephalocaudal orientation, extending from the level below the hyoid bone to the suprasternal notch, with a length of 2.5 cm and a width of 0.5 cm. What's the diagnosis?

A 13-year-old girl with welldemarcated rash on back and chest | Image Credit: © Author provided - © Author provided  - stock.adobe.com.

A healthy 13-year-old girl presented with a 1-month history of an asymptomatic, well-demarcated rash on her back and upper chest. The eruption consisted of discrete, dark brown papules that coalesced into large, flat-topped plaques with mild superficial scale and accentuation of skin markings. What's the diagnosis?

You are called to the hospital nursery to evaluate a healthy full-term newborn boy who developed painful flaccid blisters and erosions on the tops of his feet and ankles shortly after birth. His mother had a history of similar recurrent skin lesions that healed with scarring. She also had oral and gastrointestinal tract involvement. What's the diagnosis?

An 18-day-old girl whose right cheek had become increasingly red and warm over 24 hours was directly admitted to an inpatient unit. She had firmness and pain to the affected area, fussiness, increased sleeping, and poor feeding, preferring the bottle to breastfeeding. What's the diagnosis?

A healthy 4-year-old boy presents with painful deep-seated bumps on the front of his right leg. He also complains of a sore throat for the last 4 days. What's the diagnosis?