1. Recognition and pathological features of periampullary region adenocarcinoma with an indeterminable origin
- Author
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Ryuji Komine, Masaru Konishi, Kenji Notohara, Tetsuo Akimoto, Mariko Tanaka, Yoko Matsuda, Ayumi Murakami, Noriyoshi Fukushima, Takuma Tajiri, Tatsushi Kobayashi, Keita Kai, Naoto Gotohda, Toru Furukawa, Motohiro Kojima, Akiko Matsuzaki, Nobuyuki Ohike, Kenichi Hirabayashi, Yohei Masugi, Motokazu Sugimoto, Kenichi Harada, Katsunori Uchida, Yoshihiro Hamada, Yoshiki Naito, Yuko Omori, Hiroshi Yamaguchi, Yumi Mihara, Yuki Fukumura, Kazuyuki Ishida, Tomoko Sugiyama, Shinichiro Takahashi, Masashi Kudo, Motoko Sasaki, Shin Kobayashi, and Genichiro Ishi
- Subjects
Male ,0301 basic medicine ,Ampulla of Vater ,Cancer Research ,medicine.medical_specialty ,ampulla of Vater carcinoma ,Common Bile Duct Neoplasms ,pancreatic ductal adenocarcinoma ,indeterminable tumor primary ,periampullary region ,Adenocarcinoma ,distal bile duct carcinoma ,Periampullary Region ,Bile duct cancer ,03 medical and health sciences ,Pancreatectomy ,0302 clinical medicine ,Surveys and Questionnaires ,Pancreatic cancer ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Prospective Studies ,RC254-282 ,Original Research ,Aged ,Pancreatic duct ,Bile duct ,business.industry ,Pancreatic Ducts ,Clinical Cancer Research ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,medicine.disease ,Primary tumor ,Distal Bile Duct Carcinoma ,Pancreatic Neoplasms ,030104 developmental biology ,medicine.anatomical_structure ,Oncology ,030220 oncology & carcinogenesis ,Neoplasms, Unknown Primary ,Female ,Bile Ducts ,Radiology ,business - Abstract
Determination of the primary tumor in periampullary region carcinomas can be difficult, and the pathological assessment and clinicopathological characteristics remain elusive. In this study, we investigated the current recognition and practices for periampullary region adenocarcinoma with an indeterminable origin among expert pathologists through a cognitive survey. Simultaneously, we analyzed a prospective collection of cases with an indeterminable primary tumor diagnosed from 2008 to 2018 to elucidate their clinicopathological features. All cases with pathological indeterminable primary tumors were reported and discussed in a clinicopathological conference to elucidate if it was possible to distinguish the primary tumor clinically and pathologically. From the cognitive survey, over 85% of the pathologists had experienced cases with indeterminable primary tumors; however, 70% of the cases was reported as pancreatic cancer without definitive grounds. Interpretation of the main tumor mass varied, and no standardized method was developed to determine the primary tumor. During a prospective study, 42 of the 392 periampullary carcinoma cases (10.7%) were considered as tumors with a pathological indeterminable origin. After the clinicopathological conferences, 21 (5.4%) remained indeterminable and were considered final indeterminable cases. Histological studies showed that the tumors spread along both the bile duct and main pancreatic duct; this was the most representative finding of the final indeterminable cases. This study is the first to elucidate and recognize the current clinicopathological features of periampullary region adenocarcinomas with an indeterminable origin. Adequate assessment of primary tumors in periampullary region carcinomas will help to optimize epidemiological data of pancreatic and bile duct cancer., This study is the first to elucidate and recognize the current clinicopathological features of periampullary region adenocarcinomas with an indeterminable origin.
- Published
- 2021