Abstract
Introduction: Infectious sacroiliitis is a rare condition that occurs when there is inflammation of the sacroiliac joint and typically presents with lower back pain that can radiate to the buttocks and lower limb. Its diagnosis is often complex due to its clinical manifestation and rarity.
Case report: We present a 55-year-old male patient who presented with lumbar pain radiating to the gluteal region. Magnetic resonance imaging (MRI) confirmed findings consistent with left sacroiliac infectious arthropathy, revealing a collection compatible with an abscess that compromised the ipsilateral iliopsoas muscle. The patient was successfully treated conservatively with antibiotic therapy, avoiding surgical drainage.
Discussion: In sacroiliitis, physical exams and medical history are crucial for suspecting the diagnosis; they help decide if imaging tests are needed and guide the right treatment to avoid risks and complications.
Conclusion: This case highlights a disease with low prevalence and emphasises the importance of proper physician examinations, medical history and advanced imaging, specifically MRI, in confirming diagnosis and guiding treatment options.
