Metastasizing pleomorphic adenoma of the parotid gland: A common tumour with a very unusual presentation / Metástasis de adenoma pleomorfo de la glándula parótida: un tumor frecuente con una presentación muy poco habitual

Metastasizing pleomorphic adenoma is recognized as a subtype of pleomorphic adenoma in WHO classification 5th edition of salivary glands. The controversy pertaining to the entity is the benign features of the disease even at a metastatic site. We present a rare case of left recurrent pre-auricular swelling in a young male reported as metastasizing pleomorphic adenoma. A nineteen-year-old male presented with left preauricular swelling seven years ago which was diagnosed as pleomorphic adenoma and underwent complete excision of tumour. The tumour recurred twice – two and five years after the surgery. At the second recurrence, the level II neck dissection showed multiple encapsulated deposits of pleomorphic adenoma having similar morphology in the cervical soft tissue with no features of high-grade transformation. (AU)

La metástasis de adenoma pleomorfo está reconocida como un subtipo de adenoma pleomorfo según la clasificación de tumores de las glándulas salivales de la Organización Mundial de la Salud (OMS), 5ª edición. La controversia sobre la entidad se refiere a las características benignas de la enfermedad, incluso en lugares de metástasis. Presentamos un raro caso, en un varón de 19 años, de inflamación preauricular izquierda recurrente que se comunica como una metástasis de adenoma pleomorfo. El paciente presentó inflamación preauricular izquierda hace siete años, que se diagnosticó como adenoma pleomorfo, y se sometió a una resección completa del tumor, el cual presentó dos recidivas, dos y cinco años después de la cirugía. En la segunda recidiva, la resección a nivel II del cuello mostró múltiples depósitos encapsulados de adenoma pleomorfo de morfología similar en el tejido blando cervical, sin características de transformación de alto grado. (AU)

Metastasizing pleomorphic adenoma of the parotid gland: A common tumour with a very unusual presentation.

Metastasizing pleomorphic adenoma is recognized as a subtype of pleomorphic adenoma in WHO classification 5th edition of salivary glands. The controversy pertaining to the entity is the benign features of the disease even at a metastatic site. We present a rare case of left recurrent pre-auricular swelling in a young male reported as metastasizing pleomorphic adenoma. A nineteen-year-old male presented with left preauricular swelling seven years ago which was diagnosed as pleomorphic adenoma and underwent complete excision of tumour. The tumour recurred twice - two and five years after the surgery. At the second recurrence, the level II neck dissection showed multiple encapsulated deposits of pleomorphic adenoma having similar morphology in the cervical soft tissue with no features of high-grade transformation.