U.S., March 14 -- ClinicalTrials.gov registry received information related to the study (NCT06875492) titled 'Retrospective Cohort Study on the Impact of PDL Treatment History on the Efficacy of HMME-PDT in Treating PWS Children' on March 09.

Brief Summary: This retrospective study investigated the influence of prior pulse dye laser (PDL) treatment on the effectiveness of Hemoporfin-PDT in young children aged 1-3 years with PWS.

The study population included patients without a history of PDL treatment and patients with a history of PDL treatment.

Study Start Date: April 01, 2024

Study Type: OBSERVATIONAL

Condition: Port-Wine Stain

Intervention: COMBINATION_PRODUCT: HMME-PDT

Twice HMME-PDT, and the treatment interval is 2 to 3 month...