This is the ValueSet that contains all the codes in US Pathology Form Category Codes (http://hl7.org/fhir/us/cancer-reporting/ValueSet/us-pathology-form-category-codes) and US Pathology Form Category Codes (http://hl7.org/fhir/us/cancer-reporting/ValueSet/us-pathology-form-category-codes). E.g. what you have to deal with if you get resources containing codes in either of them