RESUMEN El cistoadenoma es un tumor epitelial benigno raro de glándulas salivales, de crecimiento lento y asintomático, que forma grandes masas uni o multiloculares con desarrollo papilar intraluminal. Si bien es más frecuente en glándulas salivales menores, se ha destacado lo inusual de la lesión en glándulas salivales mayores. Se presenta el caso de una mujer de 60 años, quien consultó por una masa indolora, blanda y de consistencia quistica en glándula parótida derecha, de crecimiento lento y progresivo. Su evolución fue de varios meses con piel de la zona intacta. Se realizó parotidectomia superficial. El examen histopatológico demostró cistoadenoma papilar oncocitico, tumor que ha sido destacado por su infrecuencia, y con una manifestación en parótida sumamente rara y de variados patrones histológicos. Su reconocimiento es trascendente para el profesional en casos como el que se presenta, pues su diagnóstico diferencial incluye lesiones con aspecto clínico similar y en algunos casos comportamiento agresivo.
ABSTRACT The cystadenoma is a rare benign epithelial tumor of salivary glands, characterized by slow growing and asymptomatic presentation, forming large uni or multilocular masses with intraluminal papillary development. Although it is more frequent in minor salivary glands, it has been emphasized the unusual of the major salivary glands affection. We present the case of a 60-year-old woman consulting for a painless, soft mass with cystic consistency in the right parotid gland, slow and progressive growing. The tumor evolved for several months keeping the skin of the area intact. A superficial parotidectomy was performed. Histopathological examination demonstrated a papillary oncocytic cystadenoma, a tumor that has been noted for its low frequency, and with extremely rare parotid manifestation and varied histological patterns. Its recognition is relevant for the professional in cases such as the one presented, since its differential diagnosis includes lesions with similar clinical appearance and in some cases aggressive behavior.
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