Pulmonary lymphangitis carcinomatosa in a patient with carcinoma of urinary bladder.

Pulmonary lymphangitis carcinomatosa occurs due to dissemination of cancer cells in pulmonary lymphatics. It is only rarely seen with urological malignancies and portends a grave prognosis. Its presence in patients with urothelial carcinoma of the urinary bladder is uncommon. We present a case of a nested variant of transitional cell carcinoma of the urinary bladder associated with pulmonary lymphangitis carcinomatosa. We also discuss the symptoms and radiological features that might aid in timely diagnosis of this entity.