1. Department of Neurosurgery, First Bethune Hospital of Jilin University, Changchun 130021, Jilin Province, P.R. China.
2. Department of Pathology, First Bethune Hospital of Jilin University, Changchun 130021, Jilin Province, P.R. China.
* Yongxin Luan, Haifeng Wang and Yanping Zhong contribute equally to this paper.
Intracranial dermoid cysts with hemorrhage are fairly rare. Herein, we reported a 28-year-old female patient with a cerebellar dermoid cyst, which was found accidently on neuro-imaging after head trauma. MR scanning revealed that the lesion was located within the cerebellar vermis and was measured 3.5cm×3.9cm×3.0cm, with hyper-intensity on T1WI and hypo-intensity on T2WI. However, on CT imaging, it showed hyper-dense signals. It was removed completely via midline sub-occipital approach under surgical microscope. Histological examination proved it was a dermoid cyst with internal hemorrhage. In combination with literature review, we discussed the factors that might be responsible for the hemorrhage within dermoid cysts.
Keywords: Dermoid cyst, Hemorrhage, CT, MRI, Head trauma