Journal of the European Academy of Dermatology and Venereology : JEADV · 2009
Expression of p53 and p16 in actinic keratosis, bowenoid actinic keratosis and Bowen's disease.
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Bagazgoitia L, Cuevas J, Juarranz A
Аннотация
INTRODUCTION: Bowen's disease (BD) and bowenoid actinic keratosis (bAK) have traditionally been differentiated according to the presence or absence of dysplasia in the follicular epithelium. p16 has been suggested to be a useful tool to make the differential diagnosis between BD and AK and as a marker of bad prognosis.
MATERIALS: Five biopsies of BD, five of AK and five of bAK where stained for p53 and p16.
RESULTS: All lesions showed positive immunostaining of p53, affecting to the lower two thirds of the epidermis in BD and bAK, and only the basal layer in non-bAK. All the BD and bAK cases were positive for p16, showing a similar immunostaining pattern, whereas no staining was observed in non-bAK.
DISCUSSION AND CONCLUSION: These findings suggest a common pathogenic mechanism for BD and bAK. bAK might have worse prognosis than AK. p16 might not be useful as a tool for differential diagnosis between AK and BD because bAK and BD show an extremely similar immunohistochemical pattern.
MATERIALS: Five biopsies of BD, five of AK and five of bAK where stained for p53 and p16.
RESULTS: All lesions showed positive immunostaining of p53, affecting to the lower two thirds of the epidermis in BD and bAK, and only the basal layer in non-bAK. All the BD and bAK cases were positive for p16, showing a similar immunostaining pattern, whereas no staining was observed in non-bAK.
DISCUSSION AND CONCLUSION: These findings suggest a common pathogenic mechanism for BD and bAK. bAK might have worse prognosis than AK. p16 might not be useful as a tool for differential diagnosis between AK and BD because bAK and BD show an extremely similar immunohistochemical pattern.