A Pilot Study to Explore the Role of Gut Flora in Metastatic Mesothelioma

Inclusion Criteria: 1. Signed informed consent, demonstrating that the patient understands the procedures required for the study and the purpose of the study a. May be signed by parent or legal guardian in the case of minor or adult unable to provide consent 2. Male or female of all ages. (interest is given to children who present with autism or Crohn's and whose parents wish to analyze their children's gut flora. Also of interest analysis of development of the child's microbiome. In the case of autism, the younger the child, the better to correct the neurological problems if an association is found between autism and the microbiome) 3. Diagnosis of metastatic mesothelioma through biopsy and/or advanced imaging Exclusion Criteria: 1. Refusal to sign informed consent form 2. History of bariatric surgery, total colectomy with ileorectal anastomosis or proctocolectomy. 3. Postoperative stoma, ostomy, or ileoanal pouch 4. Participation in any experimental drug protocol within the past 12 weeks 5. Treatment with total parenteral nutrition