Primary acinic cell carcinoma of the lung with lymph node metastasis

We report the case of a 30-year-old woman who presented with a subpleural mass in the lower lobe of the right lung, which was found incidentally on a routine chest radiograph. A wedge biopsy followed by lobectomy and lymph node staging revealed an acinic cell carcinoma with involvement of a hilar lymph node. The subcarinal and mediastinal lymph nodes were free of tumor. Perineural invasion was identified at the periphery of the tumor. There was no evidence of origin from salivary gland or involvement of any other organ. The patient was well 12 months postoperatively. To our knowledge, this is the second case report featuring lymph node metastasis in an acinic cell carcinoma of the lung and the first to demonstrate perineural invasion.