Fig. 1

An example of linearization within the Foundation Component by the ICD-11 (2022/6/25). ‘Acinar cell neoplasms’ has two parents, namely, ‘Histopathology’ and ‘Morphology’. ‘Acinar cell neoplasms’ also has two grandfathers, namely, ‘extension codes’ and ‘ICD-O’. In addition, ‘extension codes’ is the parent of ‘ICD-O’