OBJECTIVE To evaluate the benefits and difficulties encountered when using various 3-dimensional (3-D) navigation systems in head and neck procedures. DESIGN Five different navigation systems were used for preoperative planning and intraoperative 3-D navigation in procedures at the paranasal sinuses, the frontal and lateral skull bases, and the petrous bone. INTERVENTION Intraoperative 3-D ...

The jugular foramen is a depression on the medial and inferior surface of the petrous pyramid formed by temporal and occipital bones [1,2]. It extends anteriorly, laterally and inferiorly from the endocranium to the exocranium between the temporal and occipital bones. The foramen is divided into two parts by a fibrous or osseous bridge that connects the jugular spine on petrous part of the temp...

The surgical anatomy of the petrous bone is difficult to learn and to imagine due to the porous structure. Obviously the surgeon's training is based on cadaver dissections as we are still lacking good, versatile models of the temporal bone and its important structures. The clearly visible, rapid development of computer science provides us with new possibilities that should be immediately engage...

Endolymphatic sac tumour (ELST) is infrequent, as emerges from small series reported in the literature. It is a slow-growing malignancy with local aggressiveness and a low risk of distant metastases. It is often misdiagnosed because of the late onset of symptoms and difficulty in obtaining a biopsy. Its frequency is higher in von Hippel-Lindau (VHL) disease (a genetic systemic syndrome involvin...

OBJECTIVES To review temporal bone chondroblastomas in regards to their presentation, radiographic findings, histopathology, and treatment.Study design Case report and literature review. METHODS A case report of a 38-year-old man is reviewed who presented with left-sided mixed hearing loss, otalgia, otorrhea, and a left external auditory canal mass. A computed tomography scan revealed a 6-cm ...

BACKGROUND Temporal bone carcinoma is an aggressive tumor with multiple unconfirmed risk factors. METHODS AND RESULTS Herein, we present a rare case of a primary petrous bone carcinoma in a female patient (65 years old) with an irrelevant medical history. She presented a postauricular swelling that revealed a multilocular osteolytic cystic lesion of the mastoid portion of the temporal bone on...

A detailed analysis of the CT findings in 75 cases of acoustic neuroma is presented. The method of examination included plain and enhanced CT, metrizamide CT cisternography (M-CTC), and gas CT cisternography (gas-CTC). The common CT appearances of acoustic neuromas were as follows: 93.6% appeared as isodense or hypodense on precontrast scan; homogeneous enhancement was observed in 53.8% on post...