Conversation: The conversation between human and AI assistant.
[|Human|] my mother was diagnosed with peritoneal cancer stage 3. The doctors never made it clear if this was mesothelioma or not. Doing research peritoneal is never listed as a cancer in itself but it is listed under mesothelioma. If her biopsy says she has peritoneal stage 3 cancer does this mean it is mesothelioma or could it be another type of peritoneal cancer? thank you
[|AI|]  Thanks for your question on Chat Doctor. Peritoneal malignancies (primary) are very rare. Malignant spread in peritoneum can occur in other organ malignancies.  But primary peritoneal cancer is very rare. The most common one in this is mesothelioma. Mesothelioma is the only peritoneal cancer known. It is also affecting pleura. So if your mother is also having pleural involvement than this must be mesothelioma only. Prognosis is not very good. Chemotherapy is the only treatment available.  Rarely radiotherapy given.