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Immunohistochemical staining for HER 2 according to clinical characteristics of patients, stage and histological type of tumor
| Patient characteristics | Number of patients | HER 2 +(%) |
| Total Patients | 73 | 21 (28.8) |
| Sex | ||
| Male | 69 | 19 (27.5) |
| Female | 4 | 2 (50) |
| Stage | ||
| Stage IIIB | 30 | 9 (30) |
| Stage IV | 43 | 12 (27.9) |
| Histopathology | ||
| Adenocarcinoma | 27 | 11 (40.7) |
| Squamous cell (Epidermoid) | 34 | 5 (14.7) |
| Not otherwise specified (NOS) | 12 | 5 (41.6) |
