EGFR and Ki-67 expression in oral squamous cell carcinoma using tissue microarray technology.
J Oral Pathol Med
; 39(7): 571-8, 2010 Aug 01.
Article
in En
| MEDLINE
| ID: mdl-20202087
ABSTRACT
OBJECTIVE:
Our aim was to validate the use of tissue microarrays (TMA) in oral squamous cell carcinomas (OSCC) to analyse epidermal growth factor receptor (EGFR) and Ki-67 expression. We also analysed the relationship that the expression of these markers may have with clinical, pathological and survival variables. PATIENTS ANDMETHODS:
The study sample comprised 39 unselected patients diagnosed and treated for OSCC. We analysed Ki-67 and EGFR expression by immunohistochemistry on formalin-fixed, paraffin-embedded surgical specimens. Whole sections (WS) were compared with double 1.5 mm core-tissue microarrays.RESULTS:
High EGFR expression was observed both on TMA (in 98% of the cases) and WS (in 100% of the cases) with substantial agreement kappa value (0.720). EGFR expression was not significantly associated with clinical, pathological and survival variables on TMA and WS. Ki-67 analysis showed a Spearman correlation of 0.741 with a Ki-67 mean labelling index of 45% in TMA and 56.8% in WS. We found a significant relationship between gender and Ki-67 labelling index on WS (P = 0.022) and TMA (P = 0.002). Clinical stage was the only parameter in multivariate analysis that had a significant predictive value.CONCLUSION:
We demonstrate that dual 1.5 mm core TMA is a valid, rapid, economical and tissue-saving way to study OSCC biopsies and that it presents strong correlation with the WS. EGFR overexpression in OSCC suggests that these tumours may be a candidate for therapy investigation directed to EGFR.
Full text:
1
Database:
MEDLINE
Main subject:
Mouth Neoplasms
/
Carcinoma, Squamous Cell
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Ki-67 Antigen
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Tissue Array Analysis
/
ErbB Receptors
Type of study:
Observational_studies
/
Prognostic_studies
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Risk_factors_studies
Limits:
Adult
/
Aged
/
Aged80
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Female
/
Humans
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Male
/
Middle aged
Language:
En
Year:
2010
Type:
Article