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Giant congenital melanocytic nevi that could not be resected with standard treatments, including primary closure, tissue expansion, and skin grafting
2
Pathological confirmation of the presence of nevus cells in the deep dermal layer
3
Patients ≥6 months of age who could undergo surgery under general or local anesthesia
4
Provision of written informed consent
Exclusion Criteria:
1.
Patients with extensive scarring from previous therapies, where engraftment of the inactivated nevus was not expected
2.
Patients receiving systemic immunosuppressants or steroids
3.
Patients with allergies to penicillin, kanamycin, streptomycin, and amphotericin B or a history of allergy to penicillin and aminoglycoside antibiotics
4.
Patients allergic to cows, mice, or pigs
5.
Patients with a history of malignant skin tumors or with suspected malignant skin tumors
6.
Patients who had participated in other clinical trials within the last 3 months
7.
Patients who previously participated in this clinical trial and underwent transplantation for an inactivated autologous nevus
8.
Patients judged by the investigators as being inappropriate for participation in the clinical trial