Fluorescence in situ hybridisation analysis of human epidermal growth factor receptor 2 status for breast cancer cases in Brunei Darussalam.

Age at diagnosis is significant in determining HER-2 status of tumours by FISH (P = .045). Tumour size (P < .001) and lymph node (P = .006) are significant in metastases of tumours. The proportion of HER-2 positive cases is consistent with findings from the Asian region but higher than that of Western countries. Determining false-positive and false-negative results by IHC test is important to ensure adequate treatment for patients with breast cancer.