External nasal basal cell carcinoma comes from the basal layer of the epithelium and belongs to the category of skin cancer.It is more common in the elderly and has a lower degree of malignancy.In the early period,it can appear as a dark brown nodule.The typical symptoms can be seen in the central skin rupture,with black scab attached to the surface,which does not heal for a long time.The diagnosis must rely on medical examination.Surgical treatment is often preferred in clinical practice,and close follow-up is required after surgery to prevent tumor recurrence.In order to improve the cognitiv...
