Do you recommend sending an autoimmune work up for patients with recurrent nephrolithiasis and 24 hour urine chemistries consistent with distal renal tubular acidosis?  

I do not think there is a "right" answer to this question. First, I would want more evidence of distal renal tubular acidosis than urine chemistries. Specifically, I would do a urinary acidification test. If positive for distal RTA, and there is no other suggestion in the history or physical examina...