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Lymphocele following renal transplantation: an unusual cause of urinary retention.

Retroperitoneal pelvic lymphoceles have been reported in 1% to 2% of patients receiving renal transplants (Starzi et al., 1970; Schweizer et al., 1972). They usually become evident within 3 months following transplantation and are thought to be due to disruption of the small lymphatics adherent to the iliac vessels. Their most common mode of presentation has been mild deterioration of renal function caused by ureteric obstruction.