title: Decreasing p53 overexpression in sequential, recurrent, oral squamous cell carcinomas.
abstract: Expression of abnormal p53 protein is a widely recognised marker of malignancy including oral squamous cell carcinoma. This is a longitudinal study of p53 expression in fixed, paraffin-embedded tissue from 3 patients with multiple, recurrent, squamous cell carcinomas of floor of mouth (n = 4, 4, 3). All carcinomas demonstrated increased expression of p53 compared to normal tissues. However, there was reduction in expression from primaries to subsequent recurrent tumours in all 3 patients. The significance of reduction of expression of p53 in sequential recurrences is unclear, but as each of these patients has now survived for at least 5 years this may be a phenomenon indicating a favourable prognosis. As this study relates to only 3 patients, a larger study is needed to confirm this initial observation.
authors.affiliation: Kaohsiung-Veterans General Hospital, Taiwan.
authors.forename: K W
authors.initials: KW
authors.lastname: Leung
authors.forename: J
authors.initials: J
authors.lastname: Pedlar
authors.forename: A S
authors.initials: AS
authors.lastname: High
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000473:pathology / Q000556:secondary; D004396:Coloring Agents; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007124:Immunoenzyme Techniques; D008137:Longitudinal Studies; D008207:Lymphatic Metastasis / Q000235:genetics / Q000473:pathology; D008875:Middle Aged; D009060:Mouth Floor / Q000378:metabolism / Q000473:pathology; D009062:Mouth Neoplasms / Q000235:genetics* / Q000473:pathology; D009364:Neoplasm Recurrence, Local / Q000235:genetics* / Q000473:pathology; D016612:Paraffin Embedding; D011379:Prognosis; D015996:Survival Rate; D016159:Tumor Suppressor Protein p53 / Q000235:genetics*
chemical_list: D004396:Coloring Agents; D016159:Tumor Suppressor Protein p53