Masao Nishiya

Pancreatic cystic lesions revisited: morphologic patterns and diagnostic pitfalls in daily practice

Akio Tamura, Eisuke Mukaida, Kumpei Kirita, Jun Obara et autres

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A Case of Extrahepatic Portal Vein Obstruction Complicated by Idiopathic Portal Hypertension Treated with Living-Donor Liver Transplantation and Second-Stage Splenectomy

Yusuke Suto, Akira Umemura, Hiroyuki Nitta, Takeshi Shiohata et autres

Renal Pelvic and Periureter Masses in Cutaneous and Systemic Plasmacytosis

Tokio Katakura, Shiho Yanagawa, Masao Nishiya, Yuki Nakamura et autres

We report a case of cutaneous and systemic plasmacytosis (CSP), with unusually large bilateral renal pelvic and periureteral masses, accompanied by severe renal dysfunction. A 53-year-old man with disseminated reddish-brown plaques developed progressive renal failure over 3 years. Laboratory tests revealed polyclonal …

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Pathology in the kitchen: A playful outreach with tuna sashimi

Masao Nishiya, Naoki Yanagawa

The authors declare no conflicts of interest. The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.

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Correction: Spontaneous reactivation of hepatitis B virus with multiple novel mutations in an elderly patient with resolved hepatitis B virus infection

Tokio Sasaki, Keisuke Kakisaka, Akio Miyasaka, Masao Nishiya et autres

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Spontaneous reactivation of hepatitis B virus with multiple novel mutations in an elderly patient with resolved hepatitis B virus infection

Tokio Sasaki, Keisuke Kakisaka, Akio Miyasaka, Masao Nishiya et autres

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Pancreatic Ductal Adenocarcinoma Encapsulated by a Tumor-Forming Type 1 Autoimmune Pancreatitis Located at the Pancreatic Tail: A Case Report

Taro Ando, Hiroyuki Nitta, Akira Umemura, Hirokatsu Katagiri et autres

Introduction: Autoimmune pancreatitis (AIP) is recognized as a disease with a good prognosis that responds well to steroids, but the complication of pancreatic ductal adenocarcinoma (PDAC) in AIP is a rare condition. We report a case of PDAC encapsulated by tumor-forming type …

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Possible transmission of leukocyte chemotactic factor 2 amyloidosis after interpopulational liver transplantation

Yuji Suzuki, Masayoshi Tasaki, Keisuke Kakisaka, Masao Nishiya et autres

Several amyloid precursor proteins, such as amyloid beta peptide, prion and transthyretin, have been implicated in amyloid deposit transmission via organ transplantation. ALECT2 amyloidosis, a cond...

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Autoimmune Hepatitis Complicated by Undiagnosed Factor VII Deficiency: A Pitfall of Coagulopathy

Kotaro Kishimoto, Keisuke Kakisaka, Tamami Abe, Asami Ito et autres

Prothrombin time (PT) is a key parameter for assessing the severity of liver disease. We present the case of a 37-year-old woman with severe acute liver injury due to autoimmune hepatitis. Although prednisolone drastically improved her hepatocyte function, her PT did not …

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Improved Diagnosis of Adjacent Organ Invasion of Extrahepatic Cholangiocarcinoma by Adding Arterial and Delayed Phases

Eisuke Mukaida, Akio Tamura, Kenichi Kato, Yoshitaka Ota et autres

PURPOSE: To clarify the role of dynamic computed tomography (CT) in diagnosing extrahepatic cholangiocarcinoma (eCCA) involving adjacent organs. MATERIAL AND METHODS: We retrospectively analyzed patients diagnosed with eCCA in Iwate Medical University Hospital (Morioka, Japan) during January 2011-December 2021 who underwent dynamic …

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Extensively Invasive Gallbladder Cancer from Intracholecystic Papillary Neoplasm Treated with Pylorus-Preserving Pancreaticoduodenectomy and Extended Cholecystectomy: A Case Report and Literature Review

Hideki Kumagai, Akira Umemura, Hiroyuki Nitta, Hirokatsu Katagiri et autres

Background. Intracholecystic papillary neoplasm (ICPN) is a rare tumor first classified by the World Health Organization in 2010. ICPN is a counterpart of the intraductal papillary mucinous neoplasm of the pancreas and intraductal papillary neoplasm of the bile duct. Previous reports on …

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A case of pathological complete response with liposomal irinotecan + 5-FU/LV for unresectable locally advanced pancreatic cancer

Koji Kikuchi, Akira Umemura, Hiroyuki Nitta, Hirokatsu Katagiri et autres

BACKGROUND: Pancreatic cancer has one of the worst prognoses of any all cancers. 5-FU/leucovorin + irinotecan + oxaliplatin (FOLFIRINOX), gemcitabine (GEM) plus nab-paclitaxel regimens have been recognized as global-standard, first-line treatments for patients with advanced pancreatic cancer. The liposomal irinotecan (nal-IRI) + …

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