Patients with perianal malignant melanoma will have a black mass prolapsing from the anus, and will also be accompanied by anorectal irritation symptoms, such as anal pain and difficulty in defecation.
Perianal malignant melanoma is a lesion that occurs in the skin and mucous membranes around the anal canal, which is mainly a malignant transformation of melanocytes, and the etiology is related to DNA damage.
Perianal malignant melanoma usually occurs in the dentate line of the anal canal, clinical manifestations of the anus can be seen in the anal part of the black mass detachment, some patients will also have anal pain, defecation difficulties and other anorectal irritation symptoms. Perianal malignant melanoma often protrudes from the intestinal mucosa in the form of nodules.
Once the diagnosis of perianal malignant melanoma is confirmed, timely treatment is needed to avoid delaying the condition, or it may endanger the patient’s life and health.