Though the code structure is different, as a code set, OPCS-4 is comparable to the American Medical Association's Current Procedural Terminology.
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OPCS-4 is an alphanumeric nomenclature, with a 4 character code system similar to that found in ICD-10.
OPCs are a subtype of glia cells in the central nervous system, characterized by expression of the proteoglycan PDGFRA, and, in the case of polydendrocytes, CSPG4.