Arteriovenous malformation within the velum interpositum

Aleksandar Krbanjevic; Tibor Valyi-Nagy

doi:10.5114/pjp.2025.153978

eISSN: 2084-9869
ISSN: 1233-9687

Polish Journal of Pathology

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2/2025
vol. 76

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abstract:

Case report

Arteriovenous malformation within the velum interpositum

Aleksandar Krbanjevic

¹

,

Tibor Valyi-Nagy

²

Department of Pathology, Microbiology and Immunology, Vanderbilt University, United States of America
Department of Pathology, University of Illinois at Chicago, United States of America

Pol J Pathol 2025; 76 (2): 163-167

DOI: https://doi.org/10.5114/pjp.2025.153978

Online publish date: 2025/09/22

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We present a case involving a 70-year-old Latina woman who experienced a sudden onset of lightheadedness, diplopia, vertigo, and loss of balance. Imaging studies revealed a right thalamic intracerebral haemorrhage that obstructed the velum interpositum. Following unsuccessful embolisation, the thalamic region was surgically resected. Histopathological and immunohistochemical analyses of the resected brain tissue demonstrated abnormal blood vessels permeating through excessively cellular brain parenchyma, raising significant concern for a glial neoplasm. This case also illustrates a rare occurrence of an arteriovenous malformation within the velum interpositum, which, when acutely filled with blood, can expand the cavum and clinically present as a sudden onset of headache and vertigo.

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Arteriovenous malformation within the velum interpositum

Aleksandar Krbanjevic 1 , Tibor Valyi-Nagy 2

arteriovenous malformation, pineal gland, oligodendroglioma, brain tumours

Aleksandar Krbanjevic

¹

,

Tibor Valyi-Nagy

²