[Immunohistochemical staining of p16 in squamous cell carcinomas of the genital and extragenital area]. / Tinción inmunohistoquímica p16 en carcinomas epidermoides del área genital y extragenital.
Actas Dermosifiliogr
; 102(6): 439-47, 2011.
Article
em Es
| MEDLINE
| ID: mdl-21501833
ABSTRACT
BACKGROUND AND OBJECTIVES:
Positive immunostaining for the tumor suppressor protein p16 is associated with the presence of mucosal or αsubtypes of human papillomavirus (HPV) in cervical and genital squamous cell carcinoma (SCC). The aim of this study was to determine whether p16 immunostaining is also associated with mucosal HPV in extragenital SCC. MATERIAL ANDMETHODS:
Paraffin sections of lesions located in the genital region (8 genital warts, 3 intraepidermal SCCs, and 7 invasive SCCs) and extragenital area (29 intraepidermal SCCs corresponding to Bowen disease and 10 invasive SCCs) were stained for p16 by immunohistochemistry. Mucosal HPV was detected by polymerase chain reaction (PCR).RESULTS:
In the genital area, p16 immunostaining was negative in genital warts and positive in all 3 intraepidermal SCCs and 2 invasive SCCs (29%). Mucosal HPV was detected in 6 genital warts and 2 intraepidermal SCCs (100% after exclusion of 3 lesions that could not be analyzed by PCR) and in the 2 invasive SCCs that were positive for p16. In the extragenital area, 19 intraepidermal SCCs (95%) and 2 invasive SCCs (20%) were immunopositive for p16. Mucosal HPV was detected in 4 intraepidermal SCCs (p16 immunopositive) and 1 invasive SCC (p16 immunonegative). In intraepidermal SCCs, p16 immunostaining facilitated the identification of dermal microinfiltration or invasion of normal skin appendages.CONCLUSIONS:
According to our results, unlike in genital SCCs, p16 immunopositivity is independent of the presence of HPV in extragenital SCCs. Compared with intraepidermal SCCs, the absence of p16 protein in invasive SCCs in the extragenital area would indicate progression of the disease.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Cutâneas
/
Carcinoma de Células Escamosas
/
Neoplasias dos Genitais Femininos
/
Neoplasias dos Genitais Masculinos
/
Proteínas de Neoplasias
Limite:
Female
/
Humans
/
Male
Idioma:
Es
Revista:
Actas Dermosifiliogr
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Espanha