Recently, several cases of intraductal oncocytic papillary neoplasm (IOPN) of the liver and hepatic bile ducts have been reported. The author herein reports the first case of IOPN of the common bile duct (CBD). A 78-year-old man was admitted to our hospital because of jaundice. Imaging modalities including US, CT, MRI revealed an intraductal tumor of the middle CBD and biliary dilation distal t...

Chondrosarcoma is an uncommon malignant neoplasm of cartilaginous origin. Extraskeletal chondrosarcomas are far less common than their intraosseous counterparts, representing approximately 2% of all soft tissue sarcomas. Clinically, extraskeletal mesenchymal chondrosarcoma (EMC) shows a very fast progression. It also has a high incidence of local recurrence and distant metastasis. The most comm...

Meningiomas in children account for less than 2% of all meningiomas, and their location in the spinal region is even less common. The authors present a case of a 20-month-old female who presented with lumbar back pain, neurogenic bladder and progressive paraparesis 6 months after she started to walk. Magnetic resonance imaging demonstrated an intradural extramedullary neoplasm extending from th...

Prostate sarcoma originates from the prostatic stroma and it is an extremely rare neoplasm that accounts for less than 0.1% of primary prostate malignancies; globally, less than 200 cases have been reported in the literature.1 Leiomyosarcoma is the most common primary prostate sarcoma in adults and constitutes 38e52% of them.2 It has an aggressive clinical course.3 Here we present a case of pro...

Ameloblastoma is traditionally considered a benign epithelial neoplasm with virtually no tendency to metastasize. It is the second most common odontogenic neoplasm. Its incidence, combined with its clinical behavior, makes ameloblastoma the have been classically described as a multilocular cystlike lesion of jaw. The unicystic variant is far less frequent and has been reported only 6% of amelob...

Spindle cell Carcinoma is a rare biphasic neoplasm consisting of epithelial and mesenchymal components and accounts for less than 1% of all tumours of oral region. It is a rare aggressive variant of squamous cell carcinoma which frequently recurs and metastasizes with poor prognosis compared to classical squamous cell carcinoma. The biologic behaviour is comparable to poorly differentiated Squa...