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Inicio Revista Española de Patología Central papillary adenoma of the lung diagnosed in a bronchoscopy-guided FNA: Cy...
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Vol. 54. Issue 3.
Pages 206-210 (July - September 2021)
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Vol. 54. Issue 3.
Pages 206-210 (July - September 2021)
Brief report
Central papillary adenoma of the lung diagnosed in a bronchoscopy-guided FNA: Cytological and histological characterization of this rare entity
Adenoma papilar de pulmón de localización central diagnosticado en PAAF broncoscópica: caracterización citológica e histológica de esta rara entidad
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Iñigo Gorostiaga, Adriano Martinez-Aracil, Blanca Catón, Alvaro Perez-Rodriguez
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Osakidetza Basque Health Service, Araba University Hospital, Pathology Service, Alava, Vitoria-Gasteiz, Spain
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Abstract

Pulmonary papillary adenoma (PA) is an unusual tumor with only 32 reported cases to date. We present a case of a 69-year-old man, a smoker from the age of 12, with a central mass in the pulmonary left lower lobe identified in a PET-CT scan. Microscopical analysis of the Fine Needle Aspiration (FNA) samples showed fragments of a tumor comprised of abundant papillary structures lined by a monolayer of cytologically bland columnar to cuboidal epithelial cells. The immunohistochemical stains were positive for CK7, TTF-1 and EMA in the epithelial cells, and negative for MYC. Based on the imaging tests, histological features and immunohistochemical profile, the tumor was diagnosed as pulmonary PA. The cytologic and histologic features of this rare entity are described in detail and the value of FNA as an essential presurgical diagnostic procedure is emphasized.

Keywords:
Pulmonary papillary adenoma
Lung tumor
Cell block
Fine needle aspiration cytology
Resumen

El adenoma papilar pulmonar es un tumor inusual del que solo se han descrito 32 casos en la literatura. Presentamos el caso de un varón de 69 años, fumador desde los 12 años, al que se le identifica incidentalmente una masa central en el lóbulo pulmonar ínfero-izquierdo mediante un PET/TAC. Microscópicamente, las muestras obtenidas mediante punción aspiración con aguja fina (PAAF) mostraron un tumor compuesto por estructuras papilares revestidas por una monocapa de células epiteliales columnares a cuboidales monomorfas, sin atipia. Estas células epiteliales resultaron inmunohistoquímicamente positivas para CK7, TTF-1 y EMA, y negativas para MYC. Basándonos en las pruebas de imagen, en las características histológicas y en el perfil inmunohistoquímico, el tumor fue diagnosticado como adenoma papilar pulmonar. Por todo lo expuesto, además de realizar una descripción citológica e histológica detallada de esta rara entidad, este artículo ensalza el valor de la PAAF como técnica esencial para el diagnóstico prequirúrgico.

Palabras clave:
Adenoma papilar pulmonar
Tumor pulmonar
Citobloque
Punción aspiración con aguja fina

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