Perirenal lymphocoeles are the most common cause of perinephric fluid collection. They can potentially occur in a post-transplant situation in up to 25% of cases.
Perirenal lymphocoele is usually asymptomatic but they can be large enough to cause hydronephrosis or venous obstruction and lower limb oedema.
Perirenal lymphocoele is the most common cause of perinephric fluid collection post transplant and can happen any times from weeks to months after transplant but it most likely happens in the first month or two months after the operation. It is mostly due to inadequate ligation of iliac lymphatics during the surgery results in lymphatic leakage 6.
Often seen as a round, hypoattenuating collection similar to seroma. Calcification may be rarely seen 5.
Treatment and prognosis
Options include percutaneous drainage and open surgery.
Perirenal lymphocoele can compresses adjacent structures and causes hydronephrosis.
Imaging differential considerations include
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