case_images: PMC10790798_01
case_images: Preoperative pictures show a subcutaneous mass on the left side of the upper lip. (A) Appearance of the swelling at rest, and when the patient pushes it out with his tongue (B).
case_images: ICRP_A_2285060_F0001_C.jpg
case_images: PMC10790798_01_ICRP_A_2285060_F0001_C.jpg
case_images: F0001
case_images: A healthy seventeen-year-old boy presented with a four-month-old history of a painless slow-growing subcutaneous mass on the left side of his upper lip close to the vermillion border (Figure 1) at the pediatric plastic surgery outpatient clinic.
case_images: Intraoperative photograph of the cyst.
case_images: ICRP_A_2285060_F0002_C.jpg
case_images: PMC10790798_01_ICRP_A_2285060_F0002_C.jpg
case_images: F0002
case_images: After vertical incision on the labial mucosa with blunt preparation a well-defined, round and light colored cyst was found (Figure 2).
case_images: Histological finding of the cyst: Keratin content and trichilemmal keratinization without granular layer (* keratin, Delta keratinocytes,   fibrous capsule, H&E staining).
case_images: ICRP_A_2285060_F0003_C.jpg
case_images: PMC10790798_01_ICRP_A_2285060_F0003_C.jpg
case_images: F0003
case_images: The content of the cyst was keratin (Figure 3).
case_images: Postoperative pictures three months after surgery show good esthetic (A) and functional results (B, C).
case_images: ICRP_A_2285060_F0004_C.jpg
case_images: PMC10790798_01_ICRP_A_2285060_F0004_C.jpg
case_images: F0004
case_images: The esthetic result meets our expectations and the orbicular muscle function was also preserved (Figure 4).