Coding & Classification Systems Flashcards
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Read the first 7 Coding & Classification Systems flashcards as text
A registrar encounters a pathology report for 'squamous cell carcinoma in situ of the skin.' Which ICD-O-3 morphology code is most appropriate?
Answer: 8070/2
Squamous cell carcinoma in situ is coded 8070/2, where /2 indicates the in situ behavior.
Under AJCC 8th edition, which prefix is applied to the T, N, or M category to indicate staging performed after neoadjuvant therapy?
Answer: yp or yc
The 'y' prefix (yc or yp) is applied to TNM categories when staging is performed after neoadjuvant (preoperative) systemic or radiation therapy.
Which ICD-O-3 topography code should be assigned to a malignant mesothelioma arising from the pleura?
Answer: C45.0
Malignant mesothelioma of the pleura is coded to C45.0 in ICD-O-3, which is the specific topography for pleural mesothelioma.
When a patient is diagnosed with a second primary cancer in the same organ more than three years after the first, what is the general guidance under SEER MPH rules?
Answer: Abstracted as a new primary if histology differs or per site-specific rule
SEER MPH rules generally support abstraction as a new primary when there is a different histology or sufficient time elapsed, per site-specific instructions.
In the STORE (Standards for Oncology Registry Entry) manual, which section defines the rules for determining 'Date of Diagnosis'?
Answer: Section on Coding Dates and Timing
STORE's coding rules for dates, including Date of Diagnosis, are covered in the section addressing date coding and timing of diagnostic events.
A lymphoma is diagnosed as 'follicular lymphoma, grade 1.' What ICD-O-3 histology code applies?
Answer: 9695/3
Follicular lymphoma, grade 1 is coded 9695/3 in ICD-O-3 (follicular lymphoma, small cleaved cell/grade 1).
Which coding rule applies when a patient has a clinical diagnosis of cancer but the biopsy result is listed as 'no malignancy found'?
Answer: Do not report the case
When pathologic evidence contradicts a clinical diagnosis and shows no malignancy, the case is not reportable based on that evidence.