Download S5.03 The residual tumour status must be recorded according to the

S5.03
The residual tumour status must be recorded according to the AJCC
Cancer Staging Manual (7th Edition)9
CS5.03a
The R codes are as follows. (Used with the permission of the
American Joint Committee on Cancer (AJCC), Chicago, Illinois. The
original source for this material is the AJCC Cancer Staging
Manual, Seventh Edition (2010) published by Springer Science and
Business Media LLC, www.springerlink.com.)
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R0: Complete resection, margins histologically negative, no
residual tumour left after resection (primary tumour, regional
nodes)
R1: Incomplete resection, margins histologically involved,
microscopic tumour remains after resection of gross disease
(primary tumour, regional nodes)
R2: Incomplete resection, margins macroscopically involved or
gross disease remains after subtotal resection (eg primary
tumour, regional nodes, or liver metastasis).
CS5.03b
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CS5.03c
The resection status rule also applies to lymph nodes. If a positive
lymph node is left behind it is classified as R2.
CS5.03d
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CS5.03e
Peritoneal involvement alone is not a reason to categorise the
tumour as incompletely excised.
Residual tumour classification (R status) is not limited to the
primary tumour. The R classification not only considers
locoregional residual tumour, but also distant residual tumour
in the form of unresected or incompletely resected metastases
(R2)94 For example, a metastasis in the liver from a primary
colorectal carcinoma would be M1 and R0 if the metastasis was
solitary and resected with tumour-free margins. This case
would be M1 and R2 if the metastasis was not resected.
Tumour cells that are confined to the lumen of blood vessels or
lymphatics at the resection margin are classified as R0.94