Fig. 4
From: Easily detected signs of perineural tumour spread in head and neck cancer
Axial (a and b) CT images demonstrate a normal prominent fat pad at the mandibular foramen (arrow in a) as well as a markedly smaller fat pad anterior to the mental foramen (arrow in b). Axial T1 weighted image illustrates the normal fatty bone marrow in the mandible (arrow in c) that is typically observed in older adults, after red bone marrow normally has converted to fatty bone marrow