Intracranial falcine and convexity chondromas: two case reports

Abstract

Intracranial chondromas are uncommon intracranial tumours that most frequently arise from the skull base. They can, however, arise from the calvarium or the meninges. In these cases their neuroradiological features may mimic other intracranial tumours. We present two cases of intracranial chondroma, one that originated from the convexity and the other from the falx. Total excision was achieved in both cases. The literature on intracranial chondromas is reviewed.

Characteristic CT and MRI Findings of Intracranial Chondroma

“…Our findings are therefore consistent with previous observations. Intracranial chondromas can occur as solitary lesions or as part of Maffucci's syndrome (multiple enchondromatosis associated with soft tissue angiomas) or Ollier's disease (multiple polysystemic enchondromatosis) (15,16). Intracranial chondromas differ from chondromas in other locations in the body as a result of their expansile and irregular growth patterns.…”

Chondroma of the dural convexity: A case report and literature review

“…Chondromas are unusual tumors that most commonly arise from cartilage rets in the synchondrosis at the base of the skull and have a predilection for the spheno‐ethmoidal spheno‐petrosal, spheno‐occipital or petro‐occipital regions 1,2 . The incidence of these tumors is now estimated to be between 0.2% and 0.5% of all intracranial tumors 3 While intracranial chondromas are usually located at the base of the skull, they are described outside of this area in some cases (<35%), and a subset of these tumors (15%) originate from the dura mater of the convexity, the falx, the tentorium or the choroid plexus 2,4,5 . To the best of our knowledge, 19 cases of intracranial chondromas originating from the dural convexity have been reported in the literature to date.…”

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

“…Mesenchymal, non‐meningothelial tumors originating in the CNS are rare, and are thought to arise from craniospinal meninges, vasculature and surrounding osseous structures. 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.…”