Geographic appearance

Last revised by Dr Daniel J Bell on 19 Jun 2020

Geographic appearance is a term used in imaging, and other clinical fields (e.g. histopathology) to describe lesions with a well-circumscribed margins with adjacent tissues.  The term derives from the somewhat similar appearance of the outline of countries on a map or the clear demarcation formed by the coastline against the sea 1

The usage is most commonly found in the reporting of bone lesions, especially eosinophilic granuloma e.g. skull. It can also be used to describe variations in hepatic fat deposition 2

In describing bone lesions, the boundary need not be sclerotic.

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