Merkel cell cancer staging: Difference between revisions
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==Staging== | ==Staging== | ||
* According to the [TNM staging system], there are four stages of Merkel cell carcinoma based on the tumor size, presence of [[lymph nodes]] and [[metastasis]]. Each stage is assigned a letter | * According to the [[TNM staging system]], there are four stages of Merkel cell carcinoma based on the tumor size, presence of [[lymph nodes]] and [[metastasis]]. Each stage is assigned a letter and a number. | ||
* The stages of Merkel cell carcinoma are shown in the table below: <ref>{{Cite web | title = Merkel cell carcinoma| url = http://www.merkelcell.org/staging/}}</ref> | * The stages of Merkel cell carcinoma are shown in the table below:<ref>{{Cite web | title = Merkel cell carcinoma| url = http://www.merkelcell.org/staging/}}</ref> | ||
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{{Reflist|2}} | {{Reflist|2}} | ||
[[Category:Disease]] | [[Category:Disease]] | ||
[[Category:Types of cancer]] | [[Category:Types of cancer]] | ||
[[Category:Oncology]] | [[Category:Oncology]] | ||
Revision as of 17:53, 20 August 2015
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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]
Staging
- According to the TNM staging system, there are four stages of Merkel cell carcinoma based on the tumor size, presence of lymph nodes and metastasis. Each stage is assigned a letter and a number.
- The stages of Merkel cell carcinoma are shown in the table below:[1]
| Stage | Primary Tumor | Lymph Node | Metastasis |
| 0 | In situ primary tumor | No regional lymph node metastasis | No distant metastasis |
| IA | Less than or equal to 2 cm maximum tumor dimension | Nodes negative by pathologic exam | No distant metastasis |
| IB | Less than or equal to 2 cm maximum tumor dimension | Nodes negative by clinical exam (no pathologic node exam performed) | No distant metastasis |
| IIA | Greater than 2 cm tumor dimension | Nodes negative by pathologic exam | No distant metastasis |
| IIB | Greater than 2 cm tumor dimension | Nodes negative by clinical exam (no pathologic node exam performed) | No distant metastasis |
| IIC | Primary tumor invades bone, muscle, fascia, or cartilage | No regional lymph node metastasis | No distant metastasis |
| IIIA | Any size tumor (includes invading tumors) | Micrometastasis (diagnosed after sentinel or elective lymphadenectom) | No distant metastasis |
| IIIB | Any size tumor (includes invading tumors) | Macrometastasis (defined as clinically detectable nodal metastases confirmed by therapeutic lymphadenectomy or needle biopsy) OR In transit metastasis (a tumor distinct from the primary lesion and located either between the primary lesion and the draining regional lymph nodes or distal to the primary lesion) | No distant metastasis |
| IV | Any size tumor (includes invading tumors) | Any lymph node metastasis | Metastasis beyond regional lymph nodes |
Adapted from AJCC's Cancer Staging Manual 2009