Histopathology showing “nesiodioblastosis” from a case of fibrocalculous pancreatic diabetes, showing islet tissue arising from ductal remnants (aminoethylcarbazole stain; magnification × 40; reproduced from Govindarajan et al64 with permission). Histopathology showing “nesiodioblastosis” from a case of fibrocalculous pancreatic diabetes, showing islet tissue arising from ductal remnants (aminoethylcarbazole stain; magnification × 40; reproduced from Govindarajan et al64 with permission). K K Barman et al. Postgrad Med J 2003;79:606-615 Copyright © The Fellowship of Postgraduate Medicine. All rights reserved.