Table 1. Clinicopathological characteristics of 515 patients with small cell carcinoma of esophagus.
| Characteristics | Number |
|---|---|
| Age (year) | 68.6±11.8 |
| Gender | |
| Female | 202 |
| Male | 313 |
| Ethnicity | |
| White | 404 |
| Black | 81 |
| Other (American Indian/AK Native, Asian/Pacific Islander) | 30 |
| Pathological differentiation | |
| Well | 3 |
| Moderately | 5 |
| Poorly | 127 |
| Undifferentiated | 189 |
| Unknown | 191 |
| Summary stage | |
| Distant | 259 |
| Regional | 80 |
| Localized | 81 |
| Unstaged | 95 |
| Primary site | |
| Cervical esophagus | 10 |
| Upper third of esophagus | 36 |
| Middle third of esophagus | 130 |
| Lower third of esophagus | 218 |
| Overlapping lesion of esophagus | 27 |
| Unknown | 94 |
| Marital status | |
| Married | 279 |
| Single | 61 |
| Divorced/widowed/separated | 149 |
| Unknown | 26 |
| Tumor size | |
| T1 | 61 |
| T2 | 5 |
| T3 | 42 |
| T4 | 39 |
| Unknown | 368 |
| Lymph node metastases | |
| N0 | 85 |
| N1 | 112 |
| Unknown | 318 |
| Distant metastases | |
| M0 | 99 |
| M1 | 128 |
| Unknown | 288 |
| TNM stage | |
| I | 27 |
| II | 20 |
| III | 32 |
| IV | 128 |
| Unknown | 308 |
| Surgery | |
| Yes | 41 |
| No | 462 |
| Unknown | 12 |
| Chemotherapy | |
| Yes | 324 |
| No/unknown | 191 |
| Radiotherapy | |
| Yes | 234 |
| No | 281 |
| Treatment strategy | |
| Non-treatment | 114 |
| Chemotherapy alone | 139 |
| Radiotherapy alone | 50 |
| CR | 155 |
| Surgery alone | 12 |
| SC | 8 |
| SR | 4 |
| SCR | 17 |
16 patients have no information on treatment strategy. SC, surgery combined with chemotherapy; SR, surgery combined with radiotherapy; CR, chemoradiotherapy; SCR, surgery combined with chemoradiotherapy.