Risk factors and clinical characteristics of rectal cancer recurrence after radical surgical treatment

IntroductionRecurrence of rectal cancer affects from 4% to even 50% of patients after surgical treatment. The incidence may be influenced by numerous factors depending on the patient, the characteristics of the tumor and the type and quality of the surgical technique used.AimsThe aim of this study was to assess the clinical characteristics of rectal cancer recurrence, identify potential risk factors and role of patient surveillance after primary resection of rectal cancer.Materials and methodsThe study comprised patients operated on due to recurrence of rectal cancer at the Department of General and Colorectal Surgery of Medical University of Lodz between 2014 and 2020, who were in the follow-up program at the hospital's outpatient clinic after the primary surgery. Risk factors for disease recurrence were sought by analyzing the characteristics of the primary tumor, treatment history and postoperative care.Results29 patients were included in the study, the majority (51.7%) of the patients were men. The largest group was represented by patients with stage II and III disease. The most frequently performed primary surgery was low anterior resection (LAR) (62.8%). 35% of patients received neoadjuvant treatment prior to primary surgery. We demonstrated that the lack of neoadjuvant treatment before primary surgery increases the risk of cancer recurrence nine times. Higher stage of disease at the point of primary surgery is associated with nearly seven times the risk of recurrence compared to stage I disease.ConclusionsOptimal preoperative staging, reasonable neoadjuvant treatment, proper surgical technique and precise follow-up regimen are essential for further improvement of rectal cancer outcomes.