Fig. 1

a-e The three patients from Caracas, Venezuela visiting our clinic for a diagnosis. a and b Patient 1 and patient 2 with the diagnosis of a dental sinus tract caused by respectively a M. fortuitum and M. abscessus infection. c and d Patient 3 with an infection due to M. peregrinum. Shown are the cutaneous facial sinus tract and an affected lymph node draining in the neck. The affected lymph node in the neck was removed with surgery. e A panoramic radiography of the patient 3 showing a radiolucent lesion of the periapical area of a mandibular molar (white arrow)