Question: What is (are) Megalocytic interstitial nephritis ?
Answer: Megalocytic interstitial nephritis is a rare chronic kidney disease that is characterized by inflammation of the kidney. It is similar to malakoplakia of the kidney. In this condition the inflammation is caused by various infiltrate, particularly histiocytes. A histiocyte is a type of immune cell that eats foreign substances in an effort to protect the body from infection.
Source: GARD

Question: What are the symptoms of Megalocytic interstitial nephritis ?
Answer: What are the symptoms of interstitial nephritis? Symptoms of interstitial nephritis may include blood in the urine, fever, increased or decreased urine output, mental status changes (drowsiness, confusion, coma), nausea, vomiting, rash, swelling of the body, and weight gain (from retaining fluid).
Source: GARD