Early localized morphea mimicking an acquired port-wine stain.

Port-wine stains (PWS) and morphea are distinct conditions that are easily recognized and diagnosed in pediatric patients. Rarely, early localized morphea may mimic an acquired PWS. We present 4 such cases, in two of which the initial clinical impression of acquired PWS was thought to be confirmed by histopathology. A diagnosis of morphea was made approximately 6 months to 3 years after the onset of the acquired PWS. Clinicians should be aware that an apparent acquired PWS may be an early manifestation of localized morphea and continue to monitor these lesions.