Creeping Cold Nodules: Ascending Lower Extremity Nodules in an Immunocompromised Patient

Non-tuberculous mycobacterium (NTM) infection can cause a broad range of pathology, especially in an immunocompromised patient. We report a case of ascending lower extremity nodules in a renal transplant patient that were found to be caused by <i>Mycobacterium chelonae</i>, an NTM. We discuss the clinical evaluation and workup of this patient and why NTM infections may require a high degree of clinical suspicion to properly diagnose and treat.