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Published on: February 29, 2020
Spontaneous cerebrospinal fluid rhinorrhea secondary to anterior fossa osteoradionecrosis
Zhebin Hu1, Bruno L Godoy, Gelareh Zadeh
1Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, Quebec J1H 5N4, Canada. zhebin.hu@usherbrooke.ca
Abstract:
Osteoradionecrosis (ORN) after radiation therapy of head and neck or brain tumor most often presents in the mandible, followed by the maxillary bone. This case report describes a patient who presented with spontaneous cerebrospinal fluid (CSF) rhinorrhea 12 months after conventional external beam radiotherapy for frontotemporal anaplastic astrocytoma, and was diagnosed with anterior fossa ORN. Osteolysis in the anterior fossa on CT scan confirmed the diagnosis. A prompt temporal muscle graft with pericranial flap seal treated both the ORN and the CSF rhinorrhea, but observation would have been a suitable conservative option if ORN presented without CSF rhinorrhea.
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Cranial Bones: Lateral View
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
