Data Last Updated: June 9, 2025

NAACCR Item #3911: Peritoneal Cytology

Item # Length Source of Standard Section Name Year Implemented Version Implemented XML NAACCR ID Parent XML Element
3911 1 NAACCR Stage/Prognostic Factors 2018 18 peritonealCytology Tumor
Required Status:

NPCR Collect: No recommendation
CoC Collect: Required, site specific
SEER Collect: Required, site specific
CCCR Collect: No recommendation

Description
Peritoneal cytology pertains to the results of cytologic examination for malignant cells performed on fluid that is obtained from the peritoneal cavity.
Rationale
Peritoneal Cytology is listed as a Registry Data Collection Variable in AJCC. This data item was previously collected as Corpus, CS SSF# 2.
Allowable Values
0-3, 7-9
Codes
Code Description
0 Peritoneal cytology/washing negative for malignancy
1 Peritoneal cytology/washing atypical and/or suspicious
2 Peritoneal cytology/washing malignant (positive for malignancy)
3 Unsatisfactory/nondiagnostic
7 Test ordered, results not in chart
8 Not applicable: Information not collected for this case (If this item is required by your standard setter, use of code 8 will result in an edit error.)
9 Not documented in medical record Peritoneal cytology not assessed or unknown if assessed
Code Notes
Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.