Expanding experience with spontaneous dermoid rupture in the MRI era: diagnosis and follow-up

Intracranial dermoid cysts: variations of radiological and clinical features

“…Vasospasm can also be a reaction to direct mechanical compression by the space-occupying lesions [1,11,14]. Rarely, intraventricular fat leads to rapidly developing occlusive hydrocephalus [17,23,24].…”

“…Certain radiographic characteristics have been described in the literature [22,24,36,38,45]. Osborn et al concluded that dermoid contents usually resemble fat on CT and MRI whereas epidermoids resemble CSF [29].…”

“…These acute symptoms associated with the presence of dermoids, their localisation and their rupture are well documented [1,2,5,14,15,17,18,20,23,26,33,[40][41][42]. Diagnostic findings were evaluated in the past but Gd Gadolineum, N/a not available, HCP hydrocephalus, n/v nausea/vomiting, DWI diffusion weighted imaging show strong individual variation [4,8,9,13,22,24,27,31,32,36,38,44,45]. The aim of this report is to contribute to the understanding of this complex disease by presenting a series of patients with distinct characteristics and to provide a brief literature overview.…”

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“…3,9,10 In our case, the CT image showed a hyperdensity with calcifications around the fourth ventricle, and the cranial MRI showed a soft tissue mass without significant contrast involvement, which obliterated the fourth ventricle and vermis in the middle zone of the cerebellum, compressing the cerebellar hemisphere in the adjacent brain stem, which was hyperintense in T1-weighted images; the fat density and inner part matched the calcifications. These images matched the descriptions in the literature, and the density of the calcification within the lesion was remarkable.…”

Rupture of a Spinal Dermoid Cyst May Lead to Dissemination and Progress of Fatty Tissue in the Central Spinal Canal and Intracranial Subarachnoid Space

“…They arise from ectopic embryonic remnants of ectoderm within the spinal canal at the time of neural tube closure 1 . They can be located intramedullary, intradural-extramedullary and extradurally 2,3 . Usually there is no communication between the dermoid cyst and the subarachnoid space.…”