28 September 2025
: Case report 
Prosthetic Knee Joint Infection with Haemophilus influenzae 1 Year After Total Knee Arthroplasty: A Case Report and Literature Review
Unusual clinical course, Challenging differential diagnosis, Educational Purpose (only if useful for a systematic review or synthesis)
Ahmed AlSharakhat
ABDEF 1, Safiya AlMusawi ABDEF 2*, Ahmed Husain BD 3, Wafa Hasan BD 4, Nisha Chandran Vijayamma BD 1, Feras AlMarzooq ABDEF 3
DOI: 10.12659/AJCR.950298
Am J Case Rep 2025; 26:e950298
Figure 1 Right knee computed tomography (CT) imaging of periprosthetic joint infection after total knee replacement. (A) CT Soft-tissue window axial images at the distal right femur shows large localized collection at the anterior pre-femoral fat pad with inferior extension to the suprapatellar space (arrow). No intra-articular extension is seen. Generalized cellulitis with soft- tissue edema predominate on the anterior aspect of the distal femur. Mild fatty infiltration of the vastus muscles. (B) Bone window sagittal CT right knee shows increase the lucency around the tibial prosthesis at the proximal part consisting with loosening.