Congenital sialolipoma of the parotid gland : a case report

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In 2001, Nagao et al. proposed the designation 'sialolipoma' to establish and characterize a new category of benign lipomatous tumor occurring in the salivary gland. Histologically, the tumors are characterized by a well circumscribed mass composed of glandular tissue and mature adipose elements. The amount of fatty tissue in all tumors arising in the parotid gland is 90% or more. Unlike lipomas, sialolipoma always have normal glandular tissue. To our knowledge, 13 sialolipomas of the parotid gland have been reported in the literature, and three of these tumors were pediatric cases, regarded as congenital. We hereby present the fourth congenital case of sialolipoma in the parotid gland. A one and a half year old female was referred to our department with a right parotid mass that had been present since birth. The mass was painless and had been gradually growing. MRI was useful for diagnosis. We resected the mass preserving facial nerve. No recurrence was seen in any cases after surgical resection, including our case. Therefore, surgical resection is appropriate treatment for this tumor not only in adults but also children.
Japan Society for Pediatric Otorhinolaryngologyの論文