Intracranial Intradural Aneurysmal Bone Cyst: A Unique Case

Abstract

Aneurysmal bone cyst (ABC) of the skull is exceedingly rare. We report a unique case of an intradural ABC without bone involvement presenting with raised intracranial pressure. The patient was a 14-year-old boy who presented with headache, vomiting and right focal seizure. Imaging showed a large multicystic left frontal lesion without any evidence of bone involvement. The lesion adherent to an intact sphenoid wing dura was completely excised. The histopathology report was consistent with an ABC. This case represents the first report of an ABC without involvement of the skull bones or any evidence of dural erosion. The possible mechanism of origin at this unusual location is hypothesized.

Spinal Intradural Aneurysmal Bone Cyst: A Case Report

“…With varied hyperintensity on both T1 and T2 sequences, hemorrhage was suspected. However, there were no fluid-fluid levels that are pathognomonic for ABCs (13). We suggest that when an unusual radiological appearance like this is encountered, one should have a high index of suspicion for entities not typically on the list of differential diagnoses for spinal intradural lesions.…”

Intracranial, intradural aneurysmal bone cyst

“…A case of an intracranial, intradural ABC in a young male patient with progressively severe headaches is presented. This is only the third recorded intradural case [2,3], the majority of these rare lesions being extracranial and only a minute fraction intracranial [4].…”

“…Only 6% of documented cases of ABCs are intracranial [4], such as a recently documented unusual case of an ABC arising from the ethmoid bone, presenting with proptosis and epiphora [8]. Rarer still are the intracranial, extraosseous ABCs of which only two documented cases have been found in the literature [2,3].…”

Intraspinal dural‐based primary osteoblastoma with aneurysmal bone cyst‐like change

“…Osteocartilaginous tumors are exceedingly rare, are usually dural‐based, develop in the skull and only secondarily displace dura and brain . To our knowledge, extraosseous osteoma, chondroma, osteochondroma, mesenchymal chondrosarcoma, osteosarcoma and aneurysmal bone cyst have been seldom described in the CNS. A few cases of unusual dura‐based periosteal osteoblastoma have also been reported in cranial bones, such as temporal bone and frontal cranial bone .…”

“…These symptoms may be mild enough to last for months before the patient will see a clinician. Osteogenic neoplasms that originate from the meninges are exceedingly rare, although a few cases of dural‐based osteosarcoma and intracranial aneurysmal bone cyst have been described in the literature . However, to our best knowledge, so far there has been no report of intradural osteoblastoma without any evidence of bone involvement.…”