Colorectal melanosis is the same as melena?

Colonic melanosis refers to colon melanosis, melena usually refers to black stool, colon melanosis and melena are different, in terms of disease characteristics, causes and clinical manifestations.

1, disease characteristics

Colonic melanosis to colon mucosa pigmentation as the main feature, and black stool refers to black stool.

2, the cause of disease Colonic melanosis is

usually associated with long-term constipation, frequent use of anthraquinone laxatives and other factors, and melena is usually related to dietary factors, drug properties and gastrointestinal bleeding.

3, clinical manifestations

Colonic melanosis mainly manifested as constipation, defecation difficulties, abdominal distension and other symptoms. Melena mainly manifested as black stool color, and gastrointestinal bleeding can also be accompanied by hematochezia, diarrhea, hematemesis, abdominal pain and other symptoms.