We report a @entity1 with @entity12692 arising from the @entity1085 , which caused difficulty in making the differential diagnosis against @entity1085 . A 50-year-old @entity1 presented to our institution with @entity158 . An abdominal computed tomography scan (CT) and magnetic resonance cholangiopancreatography (MRCP) study showed a 20-mm @entity5 located in the @entity1085 for which malignancy could not be completely ruled out. For the definitive diagnosis and treatment, cholecystectomy was performed. In the operation, the main @entity5 and resection margins of the cystic duct were submitted for frozen section. The @entity5 was composed of a proliferation of lymphoid tissue with no signs of @entity1141 . The ductal margin was free of @entity5 . The final histopathological diagnosis was @entity12692 , a hyaline vascular variant that developed in the gallbladder. The @entity1 is currently in @entity558 without any signs of recurrence 28  months after the operation. This is the first detailed report of @entity1085 . Making a correct diagnosis was very difficult before the operation, and only a surgical approach enabled confirmation of the diagnosis for this @entity1 .

@entity12692 arising from the XXXX causing difficulty in the differential diagnosis.

@entity1 :: ('9606', 'Species') :: ['woman', 'patient'] @entity1085 :: ('MESH:D005705', 'Disease') :: ["Castleman's disease of the gallbladder", 'gallbladder malignancies', 'gallbladder neck'] @entity558 :: ('MESH:C536528', 'Disease') :: ['good condition'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor'] @entity12692 :: ('MESH:D005871', 'Disease') :: ["Castleman's disease", "unicentric Castleman's disease"] @entity158 :: ('MESH:D010146', 'Disease') :: ['epigastric pain'] @entity1141 :: ('MESH:C535662', 'Disease') :: ['dysplasia']
@entity1085 :: (MESH:D005705,Disease) :: ['gallbladder neck']
