Final answer:
The correct term in ICD-10-PCS for "cutting out or off, without replacement, all of a body part" is resection, signifying the complete removal of a body part.
Step-by-step explanation:
The name of the root operation in ICD-10-PCS that describes "cutting out or off, without replacement, all of a body part" is C) resection. The specific terms used in the ICD-10-PCS (International Classification of Diseases, 10th Revision, Procedure Coding System) have precise definitions. A resection involves the complete removal of a body part, whereas excision typically refers to taking out some of a body part, extraction implies pulling or stripping out, and removal is generally used for taking out a device from a body part.
For example, if a complete lobe of the lung is surgically cut out due to cancer, this would be considered a resection. This term is distinct from a biopsy which involves removing a small tissue sample for laboratory analysis.