Fragmented pattern of tumor regression and lateral intramural spread may influence margin appropriateness after TEM for rectal cancer following neoadjuvant CRT - Perez, Rodrigo O.; Habr-Gama, Angelita; Smith, Fraser M.; Kosinski, Lauren; São Julião, Guilherme P.; Grzona, Esteban; Rawet, Viviane; Vianna, Maria Regina; Proscurshim, Igor; Lynn, Patrício Bernardo; Gama-Rodrigues, Joaquim (Journal of Surgical Oncology, 2014)