OpenHealth Q&A

Understanding a 1.7cm Pineal Cyst: Insights from an MRI Report

This post is regarding my spouse: F/36. **MRI Overview:** **HISTORY:** Follow-up on the benign tumor of the cerebral meninges along with other specified endocrine issues. **TECHNIQUE:** A 1.5 Tesla MRI system was employed. A total of 15 ml of Clariscan contrast agent was administered from a single-use vial of the same volume. Multiplanar MRI imaging of the brain was conducted, encompassing both T1-weighted and T2-weighted sequences. Scans were obtained both with and without the use of intravenous contrast. **COMPARISON:** Date of previous MRI: April 12, 2023 **RESULTS:** The examined orbits show normal appearance. The observed paranasal sinuses and mastoid air cells are clear. The surrounding soft tissues are also normal. The bone marrow signal remains within expected parameters. No signs of restricted diffusion are noted intracranially, indicating no acute ischemic events. The size and shape of the ventricles and subarachnoid spaces appear to be normal. A pineal cyst measuring 1.7 x 1.0 x 1.2 cm was identified, showing a mixed signal on T2/FLAIR images alongside a thin internal septum. No enhancement is observed in relation to this cyst. When compared to the previous study, it appears to have grown slightly (previously measured at 1.2 x 1.1 x 0.9 cm). Additionally, there is a stable 1.2 x 1.1 x 1.2 cm enhancing extra-axial mass located to the left of the falx over the frontal lobe in the left hemisphere, suggestive of a meningioma, which has not changed in size. No abnormalities in brain tissue signals or signs of abnormal enhancement were detected. There are also no collections outside the brain, and no indications of edema, mass effect, or midline shift. Finally, the structures in the posterior fossa appear normal. **SUMMARY:** The findings indicate an enlarging pineal cyst, currently measuring 1.7 cm, which does not show significant mass effects or evidence of hydrocephalus. Given the increase in size and specific signal characteristics, a consultation with a neurosurgeon is advisable. Also noted is a stable extra-axial mass along the left falx, consistent with a meningioma. No signs of an acute infarction or hemorrhage are present in the brain's examination.

Answers (1)

3/2/2026, 8:40:40 PM

OpenHealth AI

Your spouse's MRI results show a 1.7 cm pineal cyst that has slightly increased in size since the last MRI. While pineal cysts are often benign and typically do not cause symptoms, the increase in size warrants careful consideration. Additionally, there's a stable meningioma noted in the frontal lobe, which is also usually benign but may need monitoring.

Main Points:

1. The pineal cyst has increased in size but is still benign and not causing significant issues.
2. The meningioma has remained stable in size, which is positive.
3. A consultation with a neurosurgeon is recommended for further evaluation.

Explanation:

• Pineal Cyst: This is a fluid-filled sac in the pineal gland, which is often found incidentally and is typically harmless. They can vary in size and usually do not cause symptoms unless they become very large or cause pressure.
• Meningioma: This is a type of tumor that forms on the membranes covering the brain and spinal cord. Your spouse’s meningioma is stable, which means it is not currently changing, which is good news.

Next Steps:

1. Consult a Neurosurgeon: Schedule an appointment with a neurosurgeon for a thorough evaluation of the pineal cyst and meningioma. The specialist will help determine if any further imaging or treatments are necessary.

2. Monitor Symptoms: Be aware of any new symptoms such as headaches, vision changes, or any neurological changes, and keep a log of these to discuss with the neurosurgeon.

3. Follow Up MRI: Depending on the neurosurgeon's advice, you might need to have periodic follow-up MRIs to monitor the size of the cyst and meningioma over time.

4. Stay Informed: Educate yourselves about pineal cysts and meningiomas from reliable medical sources to feel more confident and prepared for discussions with healthcare professionals.

Your spouse's condition appears to be manageable, but it's essential to consult with experts for tailored advice. Please feel free to reach out for more information or if you have specific concerns as you navigate this situation.