Diagnosing Mycobacterium Kansasii in Shoulder Periprosthetic Joint Infection: A Rare Case Report

M. kansasii PJI, though rare, requires distinct diagnostic and treatment approaches compared to common pathogens. Diagnosis is often delayed due to the organism's slow growth and culture time, necessitating advanced techniques such as polymerase chain reaction and next-generation sequencing. Effective treatment involves extended antimycobacterial therapy and multiple surgeries. This case underscores the importance of monitoring for mycobacterial growth in suspected culture-negative PJIs and employing aggressive surgical and medical therapy to minimize complications.