<prompt> Answer this question truthfullyWhat is the history and what are the symptoms of basement membrane disease in individuals who have thin basement membranes?  <response>: <reason> Obtaining complete history both for the patient and family is an important aspect of diagnosing TBMD. The hallmark of TBMD is benign hematuria. A positive family histor y of incidental finding of intermittent or persistent hematuria is suggestive of TBMD. TBMD is mostly asymptomatic. Microscopic hematuria is found incidentally. 