<prompt> Necrotizing pappillitis may be seen in all of the following conditions except -Sickle cell diseaseTuberculous pyelonephritisDiabetes mellitusAnalgesic nephropathy  <response>: Ans. is b i.e., Tuberculous Pyelonephritiso Necrotizing pappilitis is also known as papillary necrosis.o For causes see above explanation.o Diagnostic features are -Passage of necrotic tissue in urine. Ring shadow on pyelography. 