Crossover Trial of Systemic Chemotherapy in Patients With Metastatic Well-Differentiated Mucinous Appendiceal Adenocarcinomas With Pseudomyxoma Peritonei

"Completion of 3 questionnaires at baseline and at final visit about quality of life, and 1 questionnaire about symptoms, diagnosis, treatment, prognosis, and patient's relationship with caregivers. These will take about 35-50 minutes to complete.~Completion of 3 quality of life questionnaires every 3 months for 1 year."