Continuous glucose monitor device-associated cutaneous Mycobacterium abscessus infection: a novel source of primary...

Cutaneous infections with Mycobacterium abscessus are increasingly recognized following disruption of the skin barrier. We report a 72-year-old man with an indurated nodule at a continuous glucose monitor (CGM) insertion site that persisted despite multiple courses of antibiotics. Histopathology demonstrated suppurative granulomatous inflammation, and tissue culture confirmed M. abscessus. This case identifies continuous glucose monitor use as a novel and likely underrecognized source of primary inoculation and underscores the importance of early biopsy with histopathologic, microbiologic, and molecular evaluation when appropriate in treatment-refractory lesions.