Enterovesical fistula associated with lymphoma is exceedingly rare. We
report three patients with the acquired immunodeficiency syndrome who
presented with fecaluria and pneumaturia. Non-Hodgkin lymphomas invol
ving the intestine and the urinary bladder creating an enterovesical f
istula were found at surgery in two patients and at autopsy in the thi
rd. Extranodal lymphomas are becoming more common in AIDS patients, so
that the possibility of lymphoma should be considered in the differen
tial diagnosis of enterovesical fistulas in these patients.