Change in Pelvic Incidence Associated With Sacroiliac Joint Dysfunction: A Case Report

Eric Chun Pu Chu (Corresponding Author), Arnold Yu Lok Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review


minute motions. SIJ dysfunction refers to improper movement of the SIJs. Diagnosis and evaluation of SIJ dysfunction are difficult, with use of physical maneuvers and image-guided anesthetic injection. This case report describes a 47-year-old female who experienced right buttock pain and painful limp for approximately 2 months. Standing radiographs revealed inflammatory sclerosis surrounding the right SIJ. Physical examination found tenderness over the right SIJ and positive results in provocation (the distraction, compression, and thigh thrust) tests, compatible with right SIJ dysfunction. Her pain was resolved and gait performance was retrieved following 6-month program of combined thoracolumbar manipulation and rehabilitation exercises. Unexpectedly, change in pelvic incidence (PI) angles was noticed on follow-up radiograph. PI remains more or less fixed throughout adult life since the mobility of the SIJs is considered negligible. The current presentation is designed to explore the significance of PI change. The PI disparity unfolds the possibility of recognizing SIJ dysfunction based on consecutive radiographs.

Original languageEnglish
Pages (from-to)31-35
Number of pages5
JournalJournal of Medical Cases
Issue number1
Publication statusPublished - 17 Jan 2022


  • Chiropractic
  • Pelvic incidence
  • Sacroiliac joint dysfunction
  • Spinal manipulation

ASJC Scopus subject areas

  • Medicine(all)

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