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Arquivos de Neuro-Psiquiatria

Print version ISSN 0004-282X

Arq. Neuro-Psiquiatr. vol.69 no.6 São Paulo Dec. 2011 



Supratentorial primitive neuroectodermal tumor (PNET): an uncommon location


Tumor neuroectodérmico primitivo supratentorial: uma localização incomum



Fabiano ReisI; Guilherme Henrique Alves VieiraIV; Fabio RogerioIII; Marilisa Mantovani GuerreiroV; Luciano de Souza QueirozII; Verônica de Araújo ZanardiI

IMD, PhD, Professor of the Department of Radiology of the Clinics Hospital of the State University of Campinas, Faculty of Medical Sciences (HC-FMC/UNICAMP), Campinas SP, Brazil
IIMD, PhD, Professor of the Department of Pathology, HC-FMC/UNICAMP
IIIMD, PhD, Assistant pathologist Department of Pathology, HC-FMC/UNICAMP
IVMedical Student, Department of Radiology, HC-FMC/UNICAMP
VMD, PhD, Full Professor of the Department of Neurology, HC-FMC/UNICAMP




A 10-year-old girl with headache. Diagnostic imaging demonstrated a right frontotemporal solid-cystic lesion, in the cortex and white matter, with a component with decrease in diffusion, attributed to high cellularity and nuclear-to-cytoplasmic ratio, which may be seen in PNET or lymphoma1,2. A high signal component on T1 and on T2 was observed (extracellular methaemoglobin), often seen in PNET.

Histological analysis led to the diagnosis of PNET .

Supratentorial PNETs are very rare2. More than 50% occur in the first 5 years of life2. Our case also merits attention because of the late age at presentation.






1. Guo AC, Cummings TJ, Dash RC, Provenzale JM. Lymphomas and high-grade astrocytoma: comparison of water diffusibility and histologic characteristics. Radiology 2002;224:177-183.         [ Links ]

2. Klisch J, Husstedt H, Hennings S, Velthoven V, Pagenstecher A, Schumacher M. Supratentorial primitive neuroectodermal tumours: diffusion-weighted MRI. Neuroradiology 2000;42:393-398.         [ Links ]



Fabiano Reis
UNICAMP / Departamento de Radiologia
Rua Tessália Vieira de Camargo 126
13083-887 Campinas SP - Brasil.

Received 3 June 2011.
Accepted 21 June 2011.

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