Cranial epidermoid tumors: diagnosis by computed tomography

Area of Science:

• Neuroradiology
• Oncology
• Medical Imaging

Background:

• Cranial epidermoid tumors are rare neoplasms.
• Accurate diagnosis is crucial for appropriate management.
• Distinguishing them from other intracranial masses can be challenging.

Purpose of the Study:

• To describe the characteristic computerized tomographic (CT) findings of cranial epidermoid tumors.
• To aid in the differentiation of epidermoid tumors from other intracranial tumors such as dermoid tumors and craniopharyngiomas based on CT appearance.

Main Methods:

• Retrospective review of seven histopathologically confirmed cases of cranial epidermoid tumors.
• Analysis of computerized tomographic (CT) scans, focusing on lesion density, calcification, and contrast enhancement patterns.

Main Results:

• Cranial epidermoid tumors typically present as low-density masses on CT (ranging from -2 to +10 EMI units).
• Calcification within these tumors is uncommon.
• Enhancement with contrast medium is generally absent.

Conclusions:

• Computerized tomographic (CT) imaging provides key features for diagnosing cranial epidermoid tumors.
• The described CT characteristics, including low density, lack of calcification, and absence of contrast enhancement, are valuable for differentiating epidermoid tumors from dermoid tumors and craniopharyngiomas.