PMC4040028_01
Clinical photograph of the patient's skin over the upper thoracic region showing a midline dimple (black circle)
JPN-9-30-g001.jpg
PMC4040028_01_JPN-9-30-g001.jpg
F1
On physical examination, the patient's skin over the upper thoracic region showed a midline dimple with hair [Figure 1].
Magnetic resonance imaging of spine demonstrating a wellcircumscribed intramedullary cystic mass extending from lower border of T4 to upper border of T7 and a sinus tract connecting it to the skin surface. The mass is hypointense on T1-weighted images (a) and hyperintense on T2-weighted images (b)
JPN-9-30-g002.jpg
PMC4040028_01_JPN-9-30-g002.jpg
F2
Magnetic resonance imaging (MRI) revealed a well-circumscribed intramedullary cystic mass extending from lower border of T4 to upper border of T7 and a sinus tract connecting it to the skin dimple [Figure 2].
Magnetic resonance axial images of spine showing spina bifida of T6 vertebra (a) and contrast enhancement of the intramedullary mass (b)
JPN-9-30-g003.jpg
PMC4040028_01_JPN-9-30-g003.jpg
F3
T6 was evident on axial images [Figure 3a]. The tumor was hypointense on T1-weighted images and hyperintense on T2-weighted images with enhancement appreciated on gadolinium administration [Figure 3b].
Photomicrograph of the excised mass revealing a typical dermoid cyst lined by well-differentiated keratinizing squamous epithelium (original magnification, x50)
JPN-9-30-g004.jpg
PMC4040028_01_JPN-9-30-g004.jpg
F4
Microscopic examination revealed a typical dermoid cyst lined by well-differentiated keratinizing squamous epithelium [Figure 4].