Post-Test 26


A 76-year-old female patient is treated with neoadjuvant chemoradiotherapy and a low anterior resection for a locally advanced rectal cancer. Final pathology reveals a moderately differentiated T3N1 adenocarcinoma with a radial margin of 4 mm and distal resection margin of 4 cm. Which factor is MOST prognostic for disease-free survival in this patient?

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