Neuroendocrine differentiation correlates with hormone receptor expression and decreased survival in patients with invasive breast carcinoma
- Neuroendocrine differentiation correlates with hormone receptor expression and decreased survival in patients with invasive breast carcinoma
- 배영경; 구미진; 권선영[권선영]; 최정은; 강수환; 이수정; 김애리[김애리]; 정혜라[정혜라]; 강선희[강선희]; 오훈규[오훈규]; 박지영[박지영]
- TERM-FOLLOW-UP; MAMMARY-CARCINOMA; CANCER; CELLS; PARAMETERS; TISSUE
- Issue Date
- HISTOPATHOLOGY, v.64, no.5, pp.647 - 659
- Aims Invasive breast carcinoma (IBC) with neuroendocrine (NE) differentiation has been controversial in terms of its definition and clinical outcome. We investigated the incidence and clinical significance of NE differentiation in patients with IBC. Methods and results We performed immunohistochemistry for NE markers, chromogranin-A and synaptophysin on 1428 IBC samples using tissue microarrays and classified cases with NE differentiation into two groups, focal (1-49% tumour cells positive for any NE marker) and diffuse (>= 50% tumour cells positive) groups. Fifty-nine cases (4.1%) showed NE differentiation immunohistochemically, and the majority did not show typical NE morphology. The presence of NE differentiation showed a significant association with positive oestrogen receptor (P=0.001) and progesterone receptor (P=0.008) status. Patients with NE differentiation showed worse overall survival (OS) and disease-free survival (DFS) than those without NE differentiation in both univariate (P<0.001 for both) and multivariate (OS, P=0.004; DFS, P<0.001) analyses. Conclusions IBC with NE differentiation is a distinct subtype of mammary carcinoma with an aggressive clinical outcome.
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