1. Retroclival ecchordosis physaliphora: MR imaging and review of the literature;Mehnert;AJNR Am J Neuroradiol,2004
2. Symptomatic ecchordosis physaliphora mimicking as an intracranial arachnoid cyst;Filis;J Clin Neurosci,2016
3. A surgical case of ecchordosis physaliphora;Akimoto;No Shinkei Geka,1996
4. “Intradural chordoma” or “giant ecchordosis physaliphora”? Report of two cases;Wolfe;Clin Neuropathol,1987
5. Multiple ecchordosis physaliphora: a challenging diagnosis;Zhong;Chin Med J (Engl),2015