Merkel Cell Skin

Primary Site Histology
C000-C006, C008-C009, C440-C449, C510-C512, C518-C519, C600-C602, C608-C609, C632, C809 8041, 8190, 8247

Notes

8041, 8190, 8247 (C000-C006, C008-C009, C440-C449, C510-C512, C518-C519, C600-C602, C608-C609, C632, C809) **Note 1:** The following sources were used in the development of this schema * SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998) (https://seer.cancer.gov/archive/manuals/EOD10Dig.3rd.pdf) * SEER Summary Staging Manual-2000: Codes and Coding Instructions (https://seer.cancer.gov/tools/ssm/ssm2000/) * Collaborative Stage Data Collection System, version 02.05: https://cancerstaging.org/cstage/Pages/default.aspx * Chapter 46 *Merkel Cell Carcinoma*, in the AJCC Cancer Staging Manual, Eighth Edition (2017) published by Springer International Publishing. Used with permission of the American College of Surgeons, Chicago, Illinois. **Note 2:** Merkel cell carcinoma presenting in nodal or visceral site with primary site unknown is coded to C449, Skin, NOS.

Data Items

Name Default Value Used for Staging NAACCR Item Required By Metadata
Year of Diagnosis <BLANK> No NAACCR #390 None
Primary Site <BLANK> Yes NAACCR #400 None
Histology <BLANK> Yes NAACCR #522 None
Behavior <BLANK> No NAACCR #523 None
Tumor Size Clinical <BLANK> No NAACCR #752 None
Tumor Size Pathological <BLANK> No NAACCR #754 None
Tumor Size Summary 999 Yes NAACCR #756 None
Regional Nodes Positive 99 No NAACCR #820 None
Regional Nodes Examined 99 No NAACCR #830 None
RX Summ Surgery/Radiation Sequence <BLANK> No NAACCR #1380 None
RX Summ Systemic/Surgery Sequence <BLANK> No NAACCR #1639 None
EOD Primary Tumor 999 Yes NAACCR #772 None
EOD Regional Nodes 999 Yes NAACCR #774 None
EOD Mets 00 Yes NAACCR #776 None
SS2018 <BLANK> No NAACCR #764 None
Grade Clinical 9 No NAACCR #3843 CCCR/Canada
COC
NPCR
SEER		 SSDI
Grade Pathological 9 No NAACCR #3844 CCCR/Canada
COC
NPCR
SEER		 SSDI
Grade Post Therapy <BLANK> No NAACCR #3845 CCCR/Canada
COC
NPCR
SEER		 SSDI
Lymph Nodes Isolated Tumor Cells 8 No NAACCR #3880 COC
SEER		 SSDI
Profound Immune Suppression 8 No NAACCR #3918 COC
SEER		 SSDI
Extranodal Extension Clinical 8 No NAACCR #3830 COC SSDI
Extranodal Extension Pathological 8 No NAACCR #3833 COC SSDI

Initial Context

Staging Methods

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Summary Stage 2018

Start

Additional Context
eod_2018_t = 90
eod_2018_m = 90
eod_2018_n = 90

Next Step

  2. EOD Primary Tumor
  3. ss2018_t

Next Step

  2. EOD Regional Nodes
  3. ss2018_n

Next Step

  2. EOD Mets
  3. ss2018_m

Next Step

  2. Summary Stage
  3. ss2018_derived

End

Outputs

Name Default Value Description NAACCR Item Metadata
Schema ID 00460 NAACCR #3800
None 		None
Derived Version {{ctx_alg_version}} None None
Derived Summary Stage 2018 9 NAACCR #762
None 		None