Squamous cell carcinoma of the skin classification: Difference between revisions

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| style="background:#DCDCDC;" align="center" + |T4b
| style="background:#DCDCDC;" align="center" + |T4b
| style="background:#F5F5F5;" align="left" + |Tumor with skull base invasion and/or skull base foramen involvement
| style="background:#F5F5F5;" align="left" + |Tumor with skull base invasion and/or skull base foramen involvement
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| colspan="2" style="background:#A9A9A9;" align="left" + |N - Regional lymph nodes
| colspan="2" style="background:#A9A9A9;" align="left" + |N - Regional lymph nodes

Revision as of 23:54, 10 June 2019

Squamous cell carcinoma of the skin Microchapters

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Aditya Govindavarjhulla, M.B.B.S. [2], Raviteja Guddeti, M.B.B.S. [3]

Overview

Classification

Category Criteria
T - Primary tumor
TX Primary tumor cannot be assessed
Tis Carcinoma in situ
T1 Tumor ≤ to 2 cm
T2 Tumor > 2 cm, and ≤ to 4 cm
T3 Tumor > 4 cm or minor bone erosion or perineural invasion or deep invasion
T4 Tumor with gross cortical bone/marrow, skull base invasion and/or skull base foramen invasion
T4a Tumor with gross cortical bone/marrow invasion
T4b Tumor with skull base invasion and/or skull base foramen involvement
N - Regional lymph nodes
NX Regional lymph nodes cannot be assessed
N0 No regional lymph node metastasis
N1 Metastasis in a single ipsilateral lymph node, tumor size ≤ 3 cm, and no extranodal extension
N2 * Metastasis in a single ipsilateral lymph node, tumor size ≤ 3 cm, and presence of extranodal extension; or
  • Tumor size > 3 cm but ≤ 6 cm without extranodal extension; or
  • Metastases in multiple ipsilateral lymph nodes, tumor size ≤ 6 cm without extranodal extension; or
  • In bilateral or contralateral lymph node(s), tumor size ≤ 6 cm without extranodal extension
N2a Metastasis in a single ipsilateral lymph node 3 cm or smaller in greatest dimension and ENE(+); or

A single ipsilateral node larger than 3 cm but not larger than 6 cm in greatest dimension and ENE(–)

N2b Metastases in multiple ipsilateral nodes, none larger than 6 cm in greatest dimension and ENE(–)
N2c Metastases in bilateral or contralateral lymph node(s), none larger than 6 cm in greatest dimension and ENE(–)
N3 Metastasis in a lymph node larger than 6 cm in greatest dimension and ENE(–); or

In a single ipsilateral node larger than 3 cm in greatest dimension and ENE(+); or Multiple ipsilateral, contralateral, or bilateral nodes, any with ENE(+); or A single contralateral node of any size and ENE(+)

N3a Metastasis in a lymph node larger than 6 cm in greatest dimension and ENE(–)
N3b Metastasis in a single ipsilateral node larger than 3 cm in greatest dimension and ENE(+); or

Multiple ipsilateral, contralateral, or bilateral nodes, any with ENE(+); or A single contralateral node of any size and ENE(+)

M - Distant metastasis
MX Distant metastasis cannot be assessed
M0 No distant metastasis
M1 Distant metastasis
M1a Metastasis to one organ/site without peritoneal metastasis
M1b Metastasis to two or more organs/sites without peritoneal metastasis
M1c Metastasis to the peritoneal surface and/or metastasis to other organs/sites

References


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