Discuss in detail the clinical manifestations of anorectal melanoma

Anorectal melanoma accounts for 0.4% to 1.6% of all melanomas in the body, and the probability of occurrence is relatively small. The clinical manifestations of anorectal melanoma are not specific, which makes diagnosis very difficult. Now, let the experts tell us in detail about the clinical manifestations of anorectal melanoma .

Clinical manifestations of anorectal melanoma: Anorectal melanoma blood in the stool is mostly fresh blood with a small amount of mucus, which is different from the mucus-bloody stool of rectal cancer. The latter is mainly mucus; it is also different from hemorrhoids, in which there is almost no mucus in the bloody stool.

In terms of the physical signs of anorectal melanoma, 94.7% are located within 5 cm from the anal verge. The maximum diameter of the tumor is about 3.3 cm. Therefore, rectal examination can often touch polyps or nodular masses, which is of great significance for the diagnosis of this disease. Colorectal endoscopy can find polyps or nodular masses with or without pigment. Those with pigment are often purple-blue or brown.

Therefore, for masses in the anorectal area, whether they are pigmented or not, especially those without pigment, a histopathological examination is required to clarify the nature of the mass. However, the mass should be completely removed as much as possible during biopsy to avoid iatrogenic spread. In terms of histology, melanoma cell morphology is diverse and can be divided into epithelioid cell type, spindle cell type, giant cell type, vacuolar cell type, and mixed cell type; under light microscopy.

The above is the introduction of "Clinical manifestations of anorectal melanoma", for reference only. If you have similar clinical manifestations of anorectal melanoma, you should receive treatment as soon as possible. Anorectal melanoma is very lethal! If you have other questions about the clinical manifestations of anorectal melanoma, please consult our online experts for more information.

For more information, please visit the melanoma special topic at http://www..com.cn/waike/hssl/ or consult an expert for free. The expert will then give a detailed answer based on the patient's specific situation.