CTR Coding & Classification Systems 2 — Questions and Answers
Question 1: According to ICD-O-3, which topography code represents the upper-outer quadrant of the breast?
- C50.0
- C50.2
- C50.4 (Correct answer)
- C50.8
Correct answer: C50.4
C50.4 designates the upper-outer quadrant of the breast in ICD-O-3 topography coding.
Question 2: When coding histology in ICD-O-3, what does the fifth digit (behavior code) of '/3' indicate?
- Benign
- Uncertain whether benign or malignant
- Malignant, primary site (Correct answer)
- Malignant, metastatic site
Correct answer: Malignant, primary site
In ICD-O-3, behavior code /3 denotes a malignant neoplasm at the primary site.
Question 3: Which AJCC staging edition introduced the concept of 'clinical prognostic stage' as a required stage group for breast cancer?
- 6th edition
- 7th edition
- 8th edition (Correct answer)
- 5th edition
Correct answer: 8th edition
The AJCC 8th edition (effective 2018) introduced clinical prognostic stage incorporating biomarkers for breast cancer.
Question 4: Under SEER Summary Stage 2018, a tumor that has spread to regional lymph nodes but not to distant sites is classified as:
- In situ
- Localized
- Regional (Correct answer)
- Distant
Correct answer: Regional
SEER Summary Stage 2018 classifies regional lymph node involvement as 'Regional' stage.
Question 5: Which coding system is used to classify the cause of death on a cancer patient's death certificate for registry purposes?
- ICD-O-3
- ICD-10-CM
- ICD-10 (underlying cause) (Correct answer)
- SNOMED CT
Correct answer: ICD-10 (underlying cause)
ICD-10 (the underlying cause of death classification) is used to code cause of death on death certificates.
Question 6: What does the 'M' descriptor in AJCC TNM staging represent?
- Margin status
- Mitotic index
- Distant metastasis (Correct answer)
- Morphology grade
Correct answer: Distant metastasis
In AJCC TNM staging, 'M' represents the presence or absence of distant metastasis.
Question 7: In ICD-O-3 coding, which histology code is used for 'adenocarcinoma, NOS'?
- 8000/3
- 8010/3
- 8140/3 (Correct answer)
- 8500/3
Correct answer: 8140/3
Histology code 8140/3 represents adenocarcinoma, NOS (not otherwise specified) in ICD-O-3.
CTR Coding & Classification Systems 2
According to ICD-O-3, which topography code represents the upper-outer quadrant of the breast?