Temporal hollowing causes, classifications, and treatment options: A systematic review.

We presented the spectrum of temporal hollowing grading schemas and treatment modalities currently published in the field. The use, by a majority of publications, of a grading system based on the subjective judgment of the examiner (either alone or adjunct to imaging results) suggests the need for a more standardized measurement tool. Future studies should investigate a universally applicable temporal hollowing classification system and its impact on treatment outcomes.