Appendiceal mucinous cystadenoma is not cancerous and is still a benign tumor in itself, originating mainly from the glands within the appendix, and will appear as a distinct intra-appendiceal cystic solid mass. Appendiceal mucinous cystadenoma is a cystic solid mass lesion, because the gland secretes a lot of protein mucus, which further leads to the accumulation of liquid, the lesion contains multiple segments, part of the lesion is ruptured, which may lead to local implantation, the lesion itself does not have malignant transformation of the cells, which is benign tumor, but the lesion itself will have a certain degree of malignant probability, and it is found to have an early surgical treatment. Once appendiceal cystadenoma increases significantly within a short period of time, causing pain in the right lower abdomen, adhesion or rupture, it is necessary to consult a doctor for observation and standardized treatment under the guidance of a clinician, so as to avoid delaying the condition.