Table 3
Characteristics and clinical findings of workers affected with nasopharyngeal carcinoma
| Patient No | |||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |
| N/A=not available. | |||||
| Age at diagnosis | 35.5 | 38.0 | 70.5 | 39.2 | 40.3 |
| Year of diagnosis | 1986 | 1987 | 1987 | 1990 | 1993 |
| Working years | 14.5 | 14.3 | 20.2 | 13.0 | 15.3 |
| Initial symptoms | Hearing impairment, nasal obstruction | Neck mass, diplopia | Blurred vision, ptosis | Neck mass, bloody rhinorrhoea | Bloody rhinorrhoea |
| Histological finding | Undifferentiated carcinoma | Poorly differentiated carcinoma | Undifferetiated carcinoma | Undifferetiated carcinoma with feature of lympho-epitheliomatous carcinoma | Undifferetiated carcinoma |
| Clinical staging | T4N0M0 | T4N1M1 | T4N0M0 | T2N2M0 | T1N2M0 |
| Epstein-Barr viruscapsid antigen: | |||||
| IgA | N/A | 1:160 | N/A | 1:20 | <1:10 |
| IgG | 1:640 | 1:160 | 1:160 | ||
| Current status | No evidence of recurrence | Died in 1993 (brain metastasis) | Died in 1993 (stroke) | No evidence of recurrence | No evidence of recurrence |
