Pelin Yildiz1, Ovgu Aydin Ulgen2, Cansu Yol2, Cuyan Demirkesen3. 1. Department of Pathology, Bezmialem Vakif University, Medical Faculty, Istanbul, Turkey. 2. Department of Pathology, Istanbul University, Cerrahpasa Medical Faculty, Istanbul, Turkey; and. 3. Department of Pathology, Acibadem University, School of Medicine, Istanbul, Turkey.
Abstract
BACKGROUND: Proliferating pilar tumor (PPT) is an adnexal tumor of purported differentiation toward the follicular outer root sheath. Immunohistochemistry has been suggested to differentiate between benign and malignant forms. METHODS: Eleven benign (PPT) and 9 malignant PPT lesions were reviewed; Ki67, p27, and p53 were applied. The staining intensity (strong, moderate, weak, and negative), positive cell numbers, and marker indexes (%) were scored using image-analysis software (ViraSoft). RESULTS: Overall, there was no significant correlation between Ki67 and p53 and histopathological features. However, malignant PPTs had significantly lower numbers of p27-positive cells (P = 0.030). CONCLUSIONS: Our study includes the largest group of patients in whom image analysis of p53, Ki67, and p27 has been used to try to separate benign from malignant lesions. Although there were no significant differences regarding Ki67 and p53, malignant lesions have a statistically lower expression of p27. Further studies may be needed to determine the clinical usefulness of image analysis in this differential diagnosis.
BACKGROUND: Proliferating pilar tumor (PPT) is an adnexal tumor of purported differentiation toward the follicular outer root sheath. Immunohistochemistry has been suggested to differentiate between benign and malignant forms. METHODS: Eleven benign (PPT) and 9 malignant PPT lesions were reviewed; Ki67, p27, and p53 were applied. The staining intensity (strong, moderate, weak, and negative), positive cell numbers, and marker indexes (%) were scored using image-analysis software (ViraSoft). RESULTS: Overall, there was no significant correlation between Ki67 and p53 and histopathological features. However, malignant PPTs had significantly lower numbers of p27-positive cells (P = 0.030). CONCLUSIONS: Our study includes the largest group of patients in whom image analysis of p53, Ki67, and p27 has been used to try to separate benign from malignant lesions. Although there were no significant differences regarding Ki67 and p53, malignant lesions have a statistically lower expression of p27. Further studies may be needed to determine the clinical usefulness of image analysis in this differential diagnosis.
Authors: Elena Lucia Pinto-Pulido; Ana Rodríguez-Villa Lario; Marta González-Cañete; David Vega-Díez; Dolores Vélez-Velázquez Journal: Skin Appendage Disord Date: 2021-08-18