BACKGROUND: Following polypectomy, colectomy is performed selectively to ensure complete clearance of neoplasia. OBJECTIVE: This study aimed to determine the risk factors associated with residual disease at colectomy following malignant polypectomy. DESIGN: This is a retrospective study. SETTING: This investigation took place at a tertiary teaching cancer center. PATIENTS: Consecutive patients undergoing polypectomy followed by colectomy from 1990 to 2007 were identified from a prospective database. MAIN OUTCOME MEASURES: Factors associated with residual disease at colectomy were associated with clinicopathologic features. RESULTS: Colectomy following polypectomy was performed in 143 patients: 127 with clear invasion of polyp submucosa (invasive disease), and 16 suspicious for submucosal invasion. Residual disease after colectomy was diagnosed in 27 (19%) of 143 patients. Disease was present in the colonic wall in 19 patients (13%): invasive in 16 (11%), and noninvasive in 3 (2.1%). Of the 16 patients with residual invasive disease at colectomy, 15 had clearly invasive disease at polypectomy and 1 was suspicious for invasive disease at polypectomy. Lymph node metastasis was noted in 10 (7.0%) patients. When analyzing patients with clearly invasive disease at polypectomy by margin status, residual invasive disease in the colon wall was noted in 8 of 50 (16%) with <1 mm (positive) polypectomy margin, 7 of 33 (21%) with indeterminate polypectomy margin, and 0 of 44 with ≥1 mm (negative) polypectomy margin (p = 0.009). Nodal metastasis was associated with the presence of lymphovascular invasion (p = 0.01). LIMITATIONS: This study is limited by its retrospective nature and selection bias. CONCLUSIONS: Following malignant polypectomy, colectomy should be considered in medically fit patients if the polypectomy margin is positive (≤1 mm) or unknown, or if lymphovascular invasion is present.
BACKGROUND: Following polypectomy, colectomy is performed selectively to ensure complete clearance of neoplasia. OBJECTIVE: This study aimed to determine the risk factors associated with residual disease at colectomy following malignant polypectomy. DESIGN: This is a retrospective study. SETTING: This investigation took place at a tertiary teaching cancer center. PATIENTS: Consecutive patients undergoing polypectomy followed by colectomy from 1990 to 2007 were identified from a prospective database. MAIN OUTCOME MEASURES: Factors associated with residual disease at colectomy were associated with clinicopathologic features. RESULTS: Colectomy following polypectomy was performed in 143 patients: 127 with clear invasion of polyp submucosa (invasive disease), and 16 suspicious for submucosal invasion. Residual disease after colectomy was diagnosed in 27 (19%) of 143 patients. Disease was present in the colonic wall in 19 patients (13%): invasive in 16 (11%), and noninvasive in 3 (2.1%). Of the 16 patients with residual invasive disease at colectomy, 15 had clearly invasive disease at polypectomy and 1 was suspicious for invasive disease at polypectomy. Lymph node metastasis was noted in 10 (7.0%) patients. When analyzing patients with clearly invasive disease at polypectomy by margin status, residual invasive disease in the colon wall was noted in 8 of 50 (16%) with <1 mm (positive) polypectomy margin, 7 of 33 (21%) with indeterminate polypectomy margin, and 0 of 44 with ≥1 mm (negative) polypectomy margin (p = 0.009). Nodal metastasis was associated with the presence of lymphovascular invasion (p = 0.01). LIMITATIONS: This study is limited by its retrospective nature and selection bias. CONCLUSIONS: Following malignant polypectomy, colectomy should be considered in medically fit patients if the polypectomy margin is positive (≤1 mm) or unknown, or if lymphovascular invasion is present.
Authors: Matthew D Rutter; Amit Chattree; Jamie A Barbour; Siwan Thomas-Gibson; Pradeep Bhandari; Brian P Saunders; Andrew M Veitch; John Anderson; Bjorn J Rembacken; Maurice B Loughrey; Rupert Pullan; William V Garrett; Gethin Lewis; Sunil Dolwani Journal: Gut Date: 2015-06-23 Impact factor: 23.059
Authors: Reetesh K Pai; Yu-Wei Cheng; Maureen A Jakubowski; Bonnie L Shadrach; Thomas P Plesec; Rish K Pai Journal: Mod Pathol Date: 2016-10-07 Impact factor: 7.842
Authors: Kim M Gijsbers; Lisa van der Schee; Tessa van Veen; Annemarie M van Berkel; Femke Boersma; Carolien M Bronkhorst; Paul D Didden; Krijn J C Haasnoot; Anne M Jonker; Koen Kessels; Nikki Knijn; Ineke van Lijnschoten; Clinton Mijnals; Anya N Milne; Freek C P Moll; Ruud W M Schrauwen; Ramon-Michel Schreuder; Tom J Seerden; Marcel B W M Spanier; Jochim S Terhaar Sive Droste; Emma Witteveen; Wouter H de Vos Tot Nederveen Cappel; Frank P Vleggaar; Miangela M Laclé; Frank Ter Borg; Leon M G Moons Journal: Endosc Int Open Date: 2022-04-14