BMC Neurology (Oct 2022)

Spontaneous regression of colloid cyst on the third ventricle: a case report with the review of the literature

  • Joo-Hwan Lee,
  • Jong-Hwan Hong,
  • Yeong Jin Kim,
  • Kyung-Sub Moon

DOI
https://doi.org/10.1186/s12883-022-02933-6
Journal volume & issue
Vol. 22, no. 1
pp. 1 – 4

Abstract

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Abstract Background Colloid cyst (CC) is a rare and benign cyst found in the third ventricle near the foramen of Monro. Although the role of surgical resection is well established in symptomatic large-sized CC, it remains debatable whether surgical removal of CC with no symptoms or minimal symptoms is necessary. Case presentation A 49-year-old male patient visited our institute for incidentally detected intracranial mass. MRI demonstrated typical, 12 mm-sized CC located in the third ventricle. It was noticed that the cyst spontaneously decreased in size from 12 mm to 4 mm on MRI at 18 months after the first visit. Conclusion Although spontaneous regression is a very rare phenomenon in CC, regular imaging study and frequent neurologic examination can be an alternative option for well-selected, asymptomatic cases.

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