Pilocytic astrocytoma of the velum interpositum.
A 72-year-old male presented with a pilocytic astrocytoma in the velum interpositum manifesting as a 5-day history of dizziness attacks and unstable gait. Computed tomography and T1-weighted magnetic resonance imaging with gadolinium enhancement demonstrated a small, homogeneously enhanced mass in the velum interpositum. The tumor was removed subtotally, and the structure of the splenium was intact. The histological diagnosis was pilocytic astrocytoma. The MIB-1 growth fraction was 5%. The tumor may have originated from the splenium or the thalamus. The aggressive histology indicates the need for close neuroimaging follow-up.
Ideguchi
M
M
Department of Neurosurgery, Yamaguchi University School of Medicine, Ube.
Nishizaki
T
T
Harada
K
K
Kwak
T
T
Murakami
T
T
Ito
H
H
D000368:Aged; D034961:Antigens, Nuclear; D001254:Astrocytoma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D014408:Biomarkers, Tumor / Q000032:analysis; D001932:Brain Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D003337:Corpus Callosum / Q000473:pathology / Q000601:surgery; D006801:Humans; D019394:Ki-67 Antigen; D008279:Magnetic Resonance Imaging; D008297:Male; D009687:Nuclear Proteins / Q000032:analysis; D013786:Thalamic Diseases / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D014057:Tomography, X-Ray Computed
D034961:Antigens, Nuclear; D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen; D009687:Nuclear Proteins