### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Father-in-law- 65 years.My Father-in-law was diagonosed Gastric Cancer- stage 3A- a D2 radical gastrectomy was performed- after surgery the staging was Stage 3B- after the pathological final report- it is stage 4. The pathologists report : diagnosis is moderately differentiated adenocarcinoma-stomach, infiltrating the serosa. proximal resected margin and distal resected margin - free.Omentum metastatic deposit. 17/20 lymphnodes show metastatic deposits- pathological stage- T3 N3-stage 4.The doctors are planning chemotherapy wednesday/thursday this week- Me and wife far away from home (foreign country)- please could you give us a prognosis on his survival rate at this staging of the cancer.He is 65 years old and is diabetic, had a MI 2 years ago is fine now (but continues medication) and has an enlarged prostrate. the gastrectomy was done 2 weeks ago. Mr Samuel.

### output:

Hi, Thanks for writing in. Cancer is a challenging diagnosis and the course of disease is directed by treatment. With stage 3A stomach cancer about a third of people (38%) live at least 5 years. With stage 3B about 1 in 6 people (15%) live for more than 5 years. Survival for 5 years after first detection of cancer is a milestone and with the best treatments patients can survive 5 years or more with stage 3 stomach cancer.However, the staging has changed after 17 of 20 lymph nodes show metastasis, and presently it is in stage 4. Unfortunately, about 8 out of 10 (80%) people diagnosed with stomach cancer are stage four, meaning the cancer has already spread when they are diagnosed and this is the case with your father-in-law. Therefore, the survival statistics are lower than for stage 3 stomach cancers. Fewer than 1 in 20 people (5%) live for at least 5 years if they have stage 4 stomach cancer when they are diagnosed.