CASE REPORTS
JOURNAL ARTICLE
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Symptomatic intracystic hemorrhage in pineal cysts. Report of 3 cases.

Pineal cysts are benign and often asymptomatic intracranial entities. Occasionally they can lead to neurological symptoms through growth or due to intracystic hemorrhage. The purpose of the current report is to describe their clinical characteristics and treatment options. In the current study, the authors illustrate the course of disease in 3 patients who developed neurological symptoms due to hemorrhage into a pineal cyst. Two of their patients had additional cerebral disease, and regular MR imaging examinations were conducted. This circumstance allowed documentation of growth and intracystic hemorrhage. After the occurrence of new neurological symptoms with severe headache, MR images showed a fluid-fluid interface due to intracystic hemorrhage. The third patient presented with acute triventricular hydrocephalus and papilledema due to aqueductal stenosis caused by intracystic hemorrhage. In all 3 cases, excision of the pineal cysts via an infratentorial/supracerebellar approach was performed. Histological examination revealed the characteristic structure of pineal cyst in all cases, with hemorrhagic residues in the form of hemosiderin deposits. All patients recovered fully after surgical removal of the cysts. Furthermore, resolution of occlusive hydrocephalus could be demonstrated in those cases with ventricular enlargement. Pineal cysts without neurological symptoms are often discovered as incidental findings on cranial MR images. In contrast, neurological symptoms such as severe headache, diplopia, or Parinaud syndrome, may occur as a result of pineal apoplexy due to intracystic hemorrhage. The authors' cases confirm that MR imaging can identify intracystic hemorrhage by a characteristic fluid-fluid interface. Their experience suggests that microsurgical resection of cysts may be an effective and curative treatment option.

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