Cancer Registry Data Collection Flashcards
7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Cancer Registry Data Collection flashcards as text
Which coding system is used to classify cancer primary sites and histologies in cancer registries?
Answer: ICD-O-3
ICD-O-3 (International Classification of Diseases for Oncology, 3rd Edition) is the standard coding system for classifying cancer by site (topography) and cell type (morphology).
In ICD-O-3 morphology codes, what does a behavior code of '/2' indicate?
Answer: In situ
A behavior code of /2 indicates carcinoma in situ, meaning cancer cells are present but have not invaded surrounding tissue.
What does 'laterality' code '2' represent for a paired organ in ICD-O-3?
Answer: Left side
In ICD-O-3, laterality code 2 represents the left side of a paired organ such as the lung, kidney, or breast.
What is the 'primary site' in cancer registry terminology?
Answer: The organ or tissue where the cancer first developed
The primary site is the organ or tissue of origin where the malignancy first arose, regardless of where it subsequently spread.
Which ICD-O-3 histology code range represents adenocarcinomas?
Answer: 8140–8389
Adenocarcinomas, which are glandular malignancies, are coded in the 8140–8389 range within the ICD-O-3 morphology classification.
In cancer registry data, what does 'grade' describe?
Answer: Degree of cellular differentiation compared to normal cells
Grade reflects how closely cancer cells resemble normal cells (differentiation), ranging from well-differentiated (Grade 1) to undifferentiated (Grade 4).
Which ICD-O-3 topography code represents the colon?
Answer: C18
C18 in ICD-O-3 topography represents the colon; C16 is stomach, C20 is rectum, and C15 is esophagus.