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Inicio Revista Española de Patología Ileal Intussusception in an Adult Caused by a Locally Invasive Inflammatory Fibr...
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Vol. 54. Issue 1.
Pages 65-69 (January - March 2021)
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Vol. 54. Issue 1.
Pages 65-69 (January - March 2021)
Brief report
Ileal Intussusception in an Adult Caused by a Locally Invasive Inflammatory Fibroid Polyp: A Case Report
Invaginación ileal en un adulto secundaria a un pólipo fibroide inflamatorio localmente invasivo: Reporte de un caso
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Luiz M. Novaa,
Corresponding author
luismi_15_16@hotmail.com

Corresponding author.
, Paul Lopezb, Clara Cerezoa, Concepción Llanosa, Irene Amata
a Department of Pathology, Complejo Hospitalario de Navarra, Pamplona, Navarra, Spain
b Department of Radiology, Complejo Hospitalario de Navarra, Pamplona, Navarra, Spain
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Abstract

Inflammatory fibroid polyps (IFPs) are rare mesenchymal neoplasms affecting the gastrointestinal tract which are considered benign and noninvasive. We present a case of an invasive IFP in a 46-year-old woman who presented with signs of intestinal obstruction due to ileal intussusception. A segment of the small intestine was resected and subsequently intestinal continuity was restored. A polypoid lesion was found obstructing the lumen. Histopathology revealed a mesenchymal proliferation of spindle and stellate cells, without cytological atypia, arranged in a fibromyxoid stroma. The tumor cells were located in the submucosa but also infiltrated the muscularis propria and the subserosa and were CD34 positive. The molecular study by PCR showed mutation in exon 12 of the PDGFRA gene. IFP is considered a true neoplasm and can also be considered as a potentially invasive lesion.

Keywords:
Inflammatory Fibroid polyp
Invasive
Mesenchymal neoplasm
Small bowel
Intussusception
PDGFRA
Resumen

Los pólipos fibroides inflamatorios (PFIs) son considerados como neoplasias mesenquimales inusuales que afectan al tracto gastrointestinal. Son consideradas benignas y generalmente no invasivas. Presentamos un caso de PFI invasivo en una mujer de 46 años que evidenció signos de obstrucción intestinal por invaginación ileal. Se realizó resección de un segmento de intestino delgado y posterior desinvaginación manual del segmento resecado, observándose una lesión polipoide que obstruía la luz. Histológicamente, la lesión estaba constituida por una proliferación mesenquimal de células fusiformes y estrelladas sin atipia citológica, dispuestas en un estroma fibromixoide. Se encontraba localizada en la submucosa, aunque también infiltraba la capa muscular propia y la subserosa. Las células de la lesión fueron positivas para CD34. El estudio molecular mediante PCR demostró mutación en el exón 12 del gen PDGFRA.

Actualmente el PFI es considerada una verdadera neoplasia que excepcionalmente tiene carácter invasivo.

Palabras clave:
Pólipo fibroide inflamatorio
Invasivo
Neoplasia mesenquimal
Intestino delgado
Invaginación
PDGFRA

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