Clinical Research Directory

Inclusion Criteria: 1. Clinically diagnosed infantile hemangioma. 2. Lesion located in at least one of the following regions: lumbosacral region, sacrococcygeal region, gluteal region, perineal region, perianal region, external genital region, or continuous extension to the lower limb. 3. Maximal lesion diameter ≥2.0 cm. 4. Written informed consent obtained from the parents or legal guardians. Exclusion Criteria: 1. Vascular anomaly other than infantile hemangioma, such as venous malformation, lymphatic malformation, arteriovenous malformation, or congenital hemangioma. 2. Previously diagnosed genetic or congenital syndrome unrelated to LUMBAR syndrome, which may independently explain the detected anomalies. 3. Incomplete clinical data preventing accurate measurement of lesion diameter. 4. Refusal of participation or refusal to complete core screening examinations. 5. Any condition judged by the investigators to be unsuitable for study participation.