Lymph node dissection for XXXX . Two- and 3-field lymph node dissection.

@entity1 @entity5 @entity418
@entity1 ' records were analyzed to evaluate the effect of lymph node dissection on the survival of @entity1 with @entity418 . @entity1 who underwent incomplete resection of the @entity5 were excluded from this study. A conventional lower mediastinal and abdominal lymph node dissection (conventional 2-field dissection) had been performed in 410 @entity1 . A complete dissection of the upper mediastinal nodes was performed in addition in 121 @entity1 (extended 2-field dissection). Sixty-four @entity1 underwent a further dissection of the cervical periesophageal lymph nodes through the thoracic cavity (super-extended 2-field dissection). A cervical, mediastinal, and abdominal lymph node dissection was carried out in another 100 @entity1 (3-field dissection). Background factors in the latter three groups were similar. Mean numbers of dissected lymph nodes in extended 2-field, super extended 2-field, and 3-field dissections were 32, 57, and 77, respectively. Operative mortality rates were 11%, 9%, and 3%, respectively. The five-year survival rates for @entity1 who underwent extended 2-field or 3-field dissection were 43% and 61%; the difference was statistically significant (P = 0.000113). The four-year survival rate for super-extended 2-field dissection was 53%. Among those @entity1 who underwent 3-field dissection, 58 (58%) had histologically positive lymph nodes. Their five-year survival rate was 47%. The @entity1 ' survival has been improved by increasing the field of lymph node dissection without deterioration of operative mortality.
