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. 2021 Apr 22;8:658538. doi: 10.3389/fmed.2021.658538

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Copyright © 2021 Caetano, Mascarenhas and Machado.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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T1WI (A) and STIR image (B) of a military subject showing a small, peri-articular, area of bone edema (arrow) on the iliac side of the right sacroiliac joint. T1WI (C,E) and STIR (D,F) images of a post-partum female with bilateral foci of bone edema (arrows) adjacent to the sacroiliac joint.