Ming-Tai Hsing1, Yen-Yun Tsai2, Hui-Ting Hsu3. 1. Department of Neurosurgery, Changhua Christian Hospital, Changhua, Taiwan. 2. Department of Dermatology, Changhua Christian Hospital, Changhua, Taiwan. 3. Department of Surgical Pathology, Changhua Christian Hospital, Changhua, Taiwan.