Oesophagus
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Oesophagus (ICD‐O‐3 C15) Including Oesophagogastric Junction (C16.0)
The classification applies only to carcinomas and includes adenocarcino mas of the oesophagogastric/gastroesophageal junction. There should be histological confirmation of the disease and division of cases by topo graphic localization and histological type. A tumour the epicentre of which is within 2 cm of the oesophagogastric junction and also extends into the oesophagus is classified and staged using the oesophageal scheme. Cancers involving the oesophagogastric junction (OGJ) whose epicentre is within the proximal 2 cm of the cardia (Siewert types I/II) are to be staged as oesophageal cancers. The following are the procedures for assessing T, N, and M categories. T categories Physical examination, imaging, endoscopy (including bron choscopy), and/or surgical exploration N categories Physical examination, imaging, and/or surgical exploration M categories Physical examination, imaging, and/or surgical exploration
Anatomical Subsites 1. Cervical oesophagus (C15.0): this commences at the lower border of the cricoid cartilage and ends at the thoracic inlet (suprasternal notch), approximately 18 cm from the upper incisor teeth. 2. Intrathoracic oesophagus a) The upper thoracic portion (C15.3) extending from the thoracic inlet to the level of the tracheal bifurcation, approximately 24 cm from the upper incisor teeth b) The mid‐thoracic portion (C15.4) is the proximal half of the oesophagus between the tracheal bifurcation and the oesophagogas tric junction. The lower level is approximately 32 cm from the upper incisor teeth c) The lower thoracic portion (C15.5), approximately 8 cm in length (includes abdominal oesophagus), is the distal half of the oesophagus between the tracheal bifurcation and the oesophagogastric junction. The lower level is approximately 40 cm from the upper incisor teeth
Digestive System
Rules for Classification