Conclusion
Pilomatrixomas are a benign adnexal tumor that sometimes can present as atypical forms such as this case. Diagnosis is usually based on clinical diagnosis, and transillumination can be a bedside clue. When the clinical diagnosis remains obscure an ultrasound can be helpful. The main aim of this case is to improve awareness of the variable presentations of pilomatrixomas and the importance of high level of suspicion supported by careful clinical evaluation.
Dr. Eichenfield is vice chair of the department of dermatology and professor of dermatology and pediatrics at the University of California, San Diego, and Rady Children’s Hospital, San Diego. Dr. Al-Nabti is a clinical fellow in the division of pediatric and adolescent dermatology, University of California, San Diego. Dr. Guelfand is a visiting dermatology resident in the division of pediaric and adolescent dermatology, University of Califonia, San Diego.
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