====== Intracranial epidermoid cyst diagnosis  ======
Diagnostic procedures evolved from [[angiography]] and [[ventriculography]] to non-invasive [[computed tomography]] and [[MRI]]
((deSouza CE, deSouza R, da Costa S, Sperling N, Yoon TH, Abdelhamid MM, Sharma 
RR, Goel A. Cerebellopontine angle epidermoid cysts: a report on 30 cases. J
Neurol Neurosurg Psychiatry. 1989 Aug;52(8):986-90. PubMed PMID: 2795068; PubMed 
Central PMCID: PMC1031839.
)).

===== CT =====

The typical imaging appearance of [[epidermoid cyst]] is homogenous non-enhanced hypodense on CT.
The CT density of the epidermoid cyst is usually between −2 and +10 [[Hounsfield]] units (HU) 
((Nguyen JB, Ahktar N, Delgado PN, Lowe LH. Magnetic resonance imaging and proton magnetic resonance spectroscopy of intracranial epidermoid tumors. Crit Rev Comput Tomogr. 2004;45(5–6):389–427. doi: 10.3109/10408370490903543.))
((Sirin S, Gonul E, Kahraman S, Timurkaynak E. Imaging of posterior fossa epidermoid tumors. Clin Neurol Neurosurg. 2005;107(6):461–7. doi: 10.1016/j.clineuro.2004.11.007.)).

===== MRI =====

see [[Intracranial epidermoid cyst MRI]].