[A case of poorly differentiated mucinous carcinoma of the gallbladder that exhibited a peculiar morphology].

A 65-year-old female presented with an elevated lesion that was identified in the gallbladder fundus via abdominal ultrasound during a medical checkup. The tumor was a pedunculated lesion, measuring 30mm in diameter, that exhibited a blood flow pattern with gradual dense staining throughout the equilibrium phase on the abdominal contrast computed tomography and a high signal intensity on T2-weighted magnetic resonance imaging. Histopathological findings revealed the proliferation of poorly differentiated adenocarcinoma, including signet ring cells, throughout the tumor along with the formation of a mucous lake.

[A case of pancreatic neuroendocrine tumor presenting with main pancreatic duct invasion].

A 52-year-old male visited a local clinic with a subjective complaint of pain in the left side of his abdomen. Abdominal CT revealed the presence of a pancreatic body tumor. On EUS, the tumor presented hypoechoic signals with an obscure boundary, which continued from the pancreatic parenchyma to the inside of the main pancreatic duct.

Intraductal tubulopapillary neoplasm of the pancreas with somatic BRAF mutation.

Intraductal tubulopapillary neoplasm (ITPN) is a rare pancreatic tumor belonging to a newly recognized entity that is coined in the 2010 WHO classification. We present a case of ITPN-associated microinvasive adenocarcinoma that developed in an asymptomatic 78-year-old patient. The tumor demonstrated all the clinical, radiological, and pathological characteristics of ITPN, but it differs from other reported cases of ITPN in molecular analysis, which revealed a somatic mutation in BRAF (c.

Acute pancreatitis caused by an ectopic mediastinal parathyroid adenoma.

A 22-year-old man was admitted to our hospital because of epigastric pain. Blood tests showed leukocytosis (8940 cells/mm(3)) and increased serum amylase levels (787 IU/L); an abdominal computed tomography (CT) scan revealed an enlarged pancreas and peripancreatic fluid collection. On the basis of these findings, he was diagnosed with acute pancreatitis.

[A case of dermoid cyst of the pancreas].

A 58-year-old man visited a local clinic after experiencing epigastric and dorsal pain. A computed tomography scan revealed a hypovascular mass in the pancreatic tail. T1-weighted magnetic resonance imaging (MRI) of the tumor showed a heterogeneous isointense signal and T2-weighted MRI showed a hyperintense signal.