Rectal Peripheral Primitive Neuroectodermal Tumor: Case Report and Radio-Pathological Correlation

• Autor(a) principal: Freire1,Gonçalo
• Data de Publicação: 2020
• Outros Autores: Mira1,Catarina, Primitivo1,Ana, Sousa1,Pedro, Madureira2,Rosa, Valentim,Maria Helena
• Tipo de documento: Relatório
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://scielo.pt/scielo.php?script=sci_arttext&pid=S2183-13512020000100019
• topic: Peripheral primitive neuroectodermal tumor; Computed tomography; Magnetic resonance imaging.

Abstract Only a few cases of peripheral Primary Neuroectodermal Tumor (pPNET) arising in the rectum have been described in the literature. We report a case of a 54-year- old male patient with urinary retention and lower abdominal pain, whose CT and MRI demonstrated a pelvic mass compressing the rectum and bladder. After surgical resection, histologic and immunohistochemical findings were compatible with a rectal pPNET, with a proliferation index of 10%. This case draws the attention to a rare and aggressive condition that has no specific symptoms or typical imaging features, consisting of a rapid growing tumor with poor prognosis, even after surgical resection and chemotherapy.