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Histopathological study of invasive ductal carcinoma (IDC) of the pancreas without associated cancerous occlusion of the main pancreatic duct
Author(s) -
Naito Yoshiki,
Suda Koichi,
Nobukawa Bunsei,
Kinoshita Hisafumi,
Kojiro Masamichi
Publication year - 2006
Publication title -
journal of hepato‐biliary‐pancreatic surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.63
H-Index - 60
eISSN - 1868-6982
pISSN - 0944-1166
DOI - 10.1007/s00534-006-1112-6
Subject(s) - occlusion , medicine , pancreas , pancreatic duct , carcinoma , pathology , pancreatic carcinoma , pancreatic cancer , cancer
Backgroud/Purpose Invasive ductal carcinoma (IDC) of the pancreas may be associated with cancerous occlusion of the main pancreatic duct (MPD) in its growth process, but at quite low a frequency; there are patients who do not develop this occlusion. Methods This study examined the histological features of surgical specimens from 8 patients with IDC without MPD occlusion, in comparison to 32 patients with IDC with this occlusion (controls). The pancreatic duct was identified by confirming the presence of mural elastic fibers on the wall of the pancreatic duct. Immunohistochemical staining was done with Ki‐67 antibody. Results The frequency of IDC without MPD occlusion was very low (5.0% [2/40] patients at Kurume University and 3.1% [4/126] patients at Juntendo University). The number of intraductal carcinoma components was 1.5 ± 1.1 per specimen in the IDCs without occlusion and 5.9 ± 2.4 in the controls ( P < 0.001). The Ki‐67 labeling index was 18.0 ± 11.7% in the IDCs without occlusion and 30.0 ± 12.1% in the controls ( P < 0.05). The number of intraductal carcinoma components and the Ki‐67 labeling index were significantly lower in the IDCs without occlusion than in the controls. Conclusions Our findings suggested that these two types of IDC could have different biological features.