Epidermoid of the quadrigeminal cistern--case report

Area of Science:

• Neuro-oncology
• Radiology
• Neurosurgery

Background:

• Epidermoid tumors are congenital tumors that represent 0.2% to 1.8% of all primary intracranial tumors.
• The quadrigeminal cistern is a rare location for epidermoid tumors, with only a few cases reported in the literature.

Observation:

• A 40-year-old female presented with headache and nausea, symptoms indicative of increased intracranial pressure.
• Magnetic resonance imaging (MRI) revealed an epidermoid tumor in the quadrigeminal cistern.
• The tumor exhibited unusual T1-weighted signal intensities, suggesting both solid and fluid components, and lacked a discernible capsule.

Findings:

• This case presents an exceptionally rare instance of an epidermoid tumor within the quadrigeminal cistern.
• The absence of a capsule and heterogeneous signal on T1-weighted MRI are atypical features for this type of tumor.
• The clinical presentation of headache and nausea is consistent with mass effect in the posterior fossa.

Implications:

• This case expands the understanding of epidermoid tumor variations and their radiological appearances.
• It underscores the importance of considering rare diagnoses in neuroimaging, even with atypical presentations.
• Further research into the pathogenesis and optimal management of capsule-absent epidermoid tumors is warranted.