Acinic cell carcinoma of the parotid gland is a rare low-grade malignant neoplasm. Data on children are sparse. For the present study, the database of a tertiary pediatric medical center was reviewed for all patients with parotid gland acinic cell carcinoma diagnosed and treated between 2004 and 2013. Clinical, histologic, treatment, and outcome parameters were collected from the medical files. Four patients were identified, 3 female and 1 male, aged 13.5 to 18 years (median 15.7) at diagnosis. One patient had a family history of parotid tumor and 1 of hypothyroidism/hyperthyroidism. Two patients had L-thyroxin-treated Hashimoto thyroiditis, and 1 had a thyroid nodule. All presented with a localized parotid mass and negative lymph nodes. Treatment consisted of partial parotidectomy, with no damage to the facial nerve. Histology confirmed the diagnosis of acinic cell carcinoma with low proliferation rate (Ki67 immunostaining 1% to 8%). No evidence of disease was found on any patient with a median follow-up at 83 months (range, 32 to 93 mo) from presentation. In our experience, the prognosis of pediatric parotid gland acinic cell carcinoma is good, and surgery alone is sufficient for treatment of early stage tumors. This is the first report of findings of a family history of thyroid disease and/or thyroid abnormalities in patients with parotid gland acinic cell carcinoma.
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