The phrase "a peripheral portion" is correct and usable in written English.
It can be used to refer to a part that is situated on the edge or periphery of something, often in a technical or descriptive context.
Example: "The study focused on a peripheral portion of the brain that is responsible for sensory processing."
Alternatives: "an outer section" or "a marginal part".
Magnetic resonance imaging (MRI) showed on T2-weighted MR images, expansion of the marrow cavity of the affected phalanx, filled with heterogeneous signal intensity, consisting of a peripheral portion of higher signal intensity and a central portion of relatively low signal intensity (Fig. 2).
The IW fs sequence usually delineates less clearly the sclerotic rim of the cyst when compared to the DESS sequence, and thus a peripheral portion of the cyst might be attributed to be ill-defined on the IW fs sequence.
In a more peripheral portion of the left pSTS/TPJ region, adults showed the opposite pattern (region ii in Fig. 2 [−38 −34 20]; adults: paired t-test, t8 = −2.31, P=0.02; adolescents: paired t-test, t16 = −1.15, P=0.13).
The type-2 collagen expression was not found in the tissue regenerated in the untreated defect, except for a limited amount in the peripheral portion.
Growth rings are densely developed in the peripheral portion of the trunk in particular.
The preserved peripheral portion showed follicular hyperplasia with Castleman-like appearance.
(2) The actively proliferating site of the tumor was usually at the peripheral portion, with abundant vascular element lined by plump endothelial cells.
Previous studies have shown that submandibular glands suffering interruption of the blood circulation from the main supplying artery have more surviving parenchymal cells in their peripheral portion than in their central portion.
Therefore, it is suggested that the parenchymal cells surviving in the ischemic peripheral portion of the submandibular gland are nourished by permeation of tissue fluid contained in the capsule.
Sediments of the inner part of the studied site are structurally more complex than those of the peripheral portion, due to high densities of empty shells of the bivalve Anomalocardia brasiliana.
