Epidermoid cyst with unusual magnetic resonance characteristics and spinal extension

Table 1 Reported intracranial epidermoid tumors with extension into the spinal canal

Author (year)	Age	Sex	Main location	Extension level	MR signal	Surgical removal
MacCarty et al. (1959) [14]	24	F	Rt. CP angle	Upper cervical	N/A	Subtotal
Keville and Wise (1959) [15]	62	Not reported	Fourth ventricle	Upper cervical	N/A	Partial
Ishii et al. (1983) [16]	53	M	Pontine	Upper cervical	N/A	Subtotal
Hasegawa et al. (1989) [13]	61	M	Rt. CP angle	C1-C2 intervertebral level	T2W SE: hyper-intensity	Subtotal
Hasegawa et al. (1989) [13]	61	M	Rt. CP angle	C1-C2 intervertebral level	IR: hypo-intensity	Subtotal
Teo et al. (2006) [7]	27	F	Lt. CP angle	C2 level	T1W SE: hyper-intensity	Subtotal
Teo et al. (2006) [7]	27	F	Lt. CP angle	C2 level	T2W SE: hypo-intensity	Subtotal
Present case	46	M	Both CP angles	C1-C2 intervertebral level		Subtotal

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