MIXED MELANOCYTIC NEVUS OF THE EXTERNAL AUDITORY CANAL

Melanocytic nevus is one of the most common benign skin neoplasms, consisting of cells representing progressive stages of migration and proliferation of melanocytes, while localization in the external auditory canal is extremely rare. Patient N. (47 years old) was admitted with complaints of a neoplasm at the entrance to the right external auditory canal. The examination revealed that in the area of the entrance to the external auditory canal along its anterior wall there is a flat formation with a finely lumpy surface, protruding above the skin surface up to 2–3 mm, with clear edges on 2/3 of the circumference and a indistinct contour on 1/3, measuring 12x8 mm in size, pale pink in color with uneven areas of pigmentation. In the operating room under the microscope control, the mass was removed instrumentally within healthy tissues, free skin flaps were placed on the wound surface, covered with silicone strips, and the external auditory canal was tamponed with a hemostatic sponge. According to the histological examination, the specimen contained a mixed melanocytic nevus. After 14 days, the tampons and silicone strips were removed, the flaps were intact, and the wound surface was completely epithelialized. During 6 months of observation, there was no recurrence of the tumor or scar deformation at the entrance to the external auditory canal. The presented clinical case of flat mixed melanocytic nevus of the external auditory canal is an extremely rare pathology for this localization, which required surgical treatment both for functional and aesthetic reasons, and for the purpose of differential diagnosis and exclusion of malignant transformation.