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Updated: Feb 7, 2026
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Microscopic Cyst Resection for the Treatment of Patients Diagnosed with Epididymal Cyst
Published on: March 31, 2023
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Ruptured intracranial dermoid cysts: Imaging at acute presentation and follow-up
Ritika Revoori1, Joel Kevin Raj Samuel2, Ajay K Singh1
1Department of Radiology, Massachusetts General Hospital, 55 Fruit St. Blk SB Rm 0029A, Boston, MA, 02114, USA.
Emergency Radiology
|February 5, 2026
Summary
Ruptured intracranial dermoid cysts, though rare, present with distinct imaging features on MRI, particularly T1-weighted sequences. Symptoms may improve, but fat dissemination within the brain persists long-term.
Area of Science:
- Neuroscience
- Radiology
- Neurosurgery
Background:
- Intracranial dermoid cysts are rare congenital tumors.
- Spontaneous rupture can lead to fat dissemination in cerebrospinal fluid (CSF) spaces.
- Rupture may cause diverse neurological symptoms and characteristic imaging findings.
Purpose of the Study:
- To evaluate the clinical presentation of ruptured intracranial dermoid cysts.
- To characterize the imaging features of ruptured intracranial dermoid cysts.
- To assess the outcomes of patients with ruptured intracranial dermoid cysts.
Main Methods:
- Retrospective review of 22 patients diagnosed with ruptured intracranial dermoid cysts (July 1997-July 2024).
- Rupture confirmation via CT/MRI showing fat droplets in CSF spaces.
- Independent imaging review by two radiologists.
Main Results:
- Headaches were the most common symptom (31.8%).
- Intraventricular and subarachnoid fat droplets were common (72.7% and 81.8%, respectively).
- MRI showed T1 hyperintense fat droplets (100%), T2 hypointense rims (35%), and SWI susceptibility loss (71%).
Conclusions:
- Ruptured intracranial dermoid cysts have recognizable imaging features, especially on T1-weighted MRI.
- Symptoms often improve post-rupture.
- Fat globules persist long-term, with some reduction observed over time.
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