case_images: PMC10666678_01
case_images: Pre-excision of PPT.
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case_images: A healthy 77-year-old woman presented with a 5-cm pink, dome-shaped, eroded exophytic tumor, over her right parietal scalp that had been slowly growing for 10 years (Figure 1).
case_images: Defect post-excision.
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case_images: The entire tumor was resected en bloc, with 8-mm lateral margins, and deep margins down to pericranium (Figure 2).
case_images: Hematoxylin and eosin stain showing the smooth pushing edge of proliferating pilar tumor at 20x magnification.
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case_images: There were multiple areas of abrupt keratinization, cystic ulceration, and calcification, consistent with a benign proliferating pilar (trichilemmal) tumor (Figures 3 and 4).
case_images: Hematoxylin and eosin stain showing the abrupt keratinization of proliferating pilar tumor at 200x magnification.
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case_images: There were multiple areas of abrupt keratinization, cystic ulceration, and calcification, consistent with a benign proliferating pilar (trichilemmal) tumor (Figures 3 and 4).
case_images: Wound bed with Integra application.
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case_images: The outer cranial table was burred to spongy bone (diploe) and covered with a collagen-glycosaminoglycan biodegradable matrix (Integra) (Integra Life Sciences, Princeton, NJ) (Figure 5).
case_images: Healthy scar at 7 months' follow-up.
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case_images: The patient was happy with the final functional and cosmetic result, and there was no sign of recurrence of PTT at 7 months' follow-up (Figure 6).