Background:

The relative rarity of synchronous para-aortic lymph node (PALN) metastasis (SPM) and metachronous PALN recurrence (MPR) in colorectal carcinoma (CRC) patients leads to a limited number of studies on patient management, and no treatment guidelines have been established to date.

Objective:

To assess the prognostic, predictive roles, and long-term outcomes of different management strategies for isolated MPR and SPM in CRC patients to establish the best one.

Materials and Methods:

We included 35 CRC patients with isolated MPR and 25 patients with isolated SPM who underwent curative R0 resection. We performed PALN dissection (PALND) in 15 cases in MPR group and in 10 cases in the SPM group; all remaining patients in both groups underwent chemoradiotherapy (CRT) without further surgical intervention. During the study period of about 5 years, we compared the patients who underwent PALND and those who underwent CRT.

Results:

The overall survival and recurrence-free survival rates were significantly longer in patients who underwent PALND (p = 0.049 and 0.036 respectively). (AU)