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Cancer Management Book Practice Test

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In ICD-O coding, which component indicates the cell type?
Correct Answer:
Morphology
Explanation:
The cell type is defined by the morphology component. In ICD-O, morphology codes specify the histologic type of the tumor—what kind of cancer cells are involved, such as adenocarcinoma, squamous cell carcinoma, lymphoma, and so on. Topography, on the other hand, tells you where the tumor started in the body (the site). Behavior indicates whether the tumor is malignant, in situ, or benign, and is attached to the code as the behavior digit after the slash. Grade reflects how differentiated the cells are, but it does not describe the cell type itself. So the morphology part is the one that indicates the actual cell type. For example, a morphology code identifies the histologic type, while the site is given by topography and the malignant nature by behavior.

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