Reprint requests to: Dr. Chun-Chung Lui Department of Diagnostic Radiology, Chang Gung Memorial Hospital Kaohsiung Medical Center, Chang Gung University College of Medicine. No. 123, Ta Pei Road, Kaohsiung 833, Taiwan, R.O.C. Aneurysmal bone cyst (ABC) infrequently involves the calvarium and is even more unusual at the skull base. The sporadic reported cases of ABC occur primarily in the pediat...

Various surgical techniques for extirpation of anterior skull base tumors have been established over the past few years. Tumors that are located in this anatomical area may invade both soft and hard tissues of the skull base. In such cases, an en bloc tumor resection may create extensive skull base defects and produce a free conduit between the paranasal sinuses and the intracranial space. Foll...

Klippel-Feil syndrome (KFS) is associated with numerous craniofacial abnormalities but rarely with skull base tumor formation. We report an unusual and dramatic case of a symptomatic, mature skull base teratoma in an adult patient with KFS, with extension through the basisphenoid to obstruct the nasopharynx. This benign lesion was associated with midline palatal and cerebral defects, most notab...

BACKGROUND Head and neck adenoid cystic carcinoma (ACC) is a malignancy of the salivary and lacrimal glands with a variable growth pattern and propensity for perineural spread. Involvement of the skull base indicates a poor prognosis. Despite surgical resection and adjuvant radiotherapy, tumor recurrence and metastases are common. The urokinase-type plasminogen activator and its receptor (uPAR)...

Introduction: Magnetic resonance imaging (MRI) provides information about tumor size and extension, infiltration of major blood vessels nerves, early bone-marrow infiltration, lymph node involvement. Transnasal endoscopic approaches are an integral part the therapeutic arsenal developed to address malignant sinonasal skull-base neoplasms. Objective: To analyze use magnetic in diagnosis perineur...

Ameloblastic carcinoma (AC) is a rare and aggressive malignant epithelial odontogenic tumor that may arise either from the mandible (66.6%) or the maxilla (33.3%). Besides being formed de novo, the tumor can develop from a pre-existing ameloblastoma or odontogenic cyst. The clinical course of AC is typically aggressive with extensive local destruction. AC has also been reported to spread to var...

Aneurysmal bone cyst (ABC) is a benign osteolytic bony lesion that can be locally destructive. It is usually observed in the first and second decades of life. This expansile bone lesion commonly involves the metaphysis of long tubular bones, posterior elements of the vertebrae, and flat bones. The skull base is an uncommon location for this tumor with a reported incidence of 3 to 6%. In the lit...