Merkel cell cancer staging: Difference between revisions
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| align="center" style="background:#f0f0f0;" |'''Metastasis (M)''' | | align="center" style="background:#f0f0f0;" |'''Metastasis (M)''' | ||
|- | |- | ||
| 0||In situ||No regional lymph node metastasis| | | 0||In situ|| | ||
* No regional lymph node metastasis | |||
| | |||
* No distant metastasis | |||
|- | |- | ||
| IA||≤2 cm ||Nodes negative by pathologic exam| | | IA||≤2 cm || | ||
* Nodes negative by pathologic exam | |||
| | |||
* No distant metastasis | |||
|- | |- | ||
| IB||≤2 cm ||Nodes negative by clinical exam (no pathologic node exam performed)| | | IB||≤2 cm || | ||
* Nodes negative by clinical exam (no pathologic node exam performed) | |||
| | |||
* No distant metastasis | |||
|- | |- | ||
| IIA||>2 cm||Nodes negative by pathologic exam| | | IIA||>2 cm|| | ||
* Nodes negative by pathologic exam | |||
| | |||
* No distant metastasis | |||
|- | |- | ||
| IIB||>2 cm||Nodes negative by clinical exam (no pathologic node exam performed)| | | IIB||>2 cm|| | ||
* Nodes negative by clinical exam (no pathologic node exam performed) | |||
| | |||
* No distant metastasis | |||
|- | |- | ||
| IIC||Invades bone, muscle and cartilage||No regional lymph node metastasis detected | | | IIC||Invades bone, muscle and cartilage|| | ||
* No regional lymph node metastasis detected | |||
| | |||
* No distant metastasis | |||
|- | |- | ||
| IIIA||Any size tumor (includes invading tumors)||Micrometastasis (diagnosed after sentinel or elective lymphadenectomy)| | | IIIA||Any size tumor (includes invading tumors)|| | ||
* Micrometastasis (which are diagnosed after sentinel or elective lymphadenectomy) | |||
| | |||
* No distant metastasis | |||
|- | |- | ||
| IIIB||Any size tumor (includes invading tumors)||Postive for: | | IIIB||Any size tumor (includes invading tumors)||Postive for: | ||
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* In transit metastasis | * In transit metastasis | ||
|No distant metastasis | | | ||
* No distant metastasis | |||
|- | |- | ||
| IV||Any size tumor (includes invading tumors)||Any lymph node metastasis| | | IV||Any size tumor (includes invading tumors)|| | ||
* Any lymph node metastasis | |||
| | |||
* Metastasis beyond regional lymph nodes | |||
|} | |} | ||
==References== | ==References== | ||
Revision as of 17:43, 17 January 2019
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Merkel cell cancer Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Merkel cell cancer staging On the Web |
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American Roentgen Ray Society Images of Merkel cell cancer staging |
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Risk calculators and risk factors for Merkel cell cancer staging |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Ahmad Al Maradni, M.D. [2]
Overview
The staging of Merkel cell cancer is based on the TNM staging system.
Staging
- According to the TNM staging system, merkel cell cancer is classified into 4 stages based on the following:
- Tumor size
- Involvement of lymph nodes, and
- Metastasis
- The stages of Merkel cell carcinoma are shown in the table below:
| Stage | Primary Tumor (T) | Lymph Node (N) | Metastasis (M) |
| 0 | In situ |
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| IA | ≤2 cm |
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| IB | ≤2 cm |
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| IIA | >2 cm |
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| IIB | >2 cm |
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| IIC | Invades bone, muscle and cartilage |
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| IIIA | Any size tumor (includes invading tumors) |
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| IIIB | Any size tumor (includes invading tumors) | Postive for:
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| IV | Any size tumor (includes invading tumors) |
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