Papillary Thyroid Cancer and Lung Adenocarcinoma Presenting as Two Primary Malignancies in a Patient with Symptomatic Goiter.

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In rare instances, patients may be diagnosed with two different primary malignancies. Though such synchronous malignancies have been documented in sporadic case reports, the overwhelming majority of malignancies involving multiple organs can be attributed to a primary source. Papillary thyroid carcinoma and lung adenocarcinoma are rarely diagnosed within the same year. Our case report presents a patient who was diagnosed with these two malignancies during her same hospital visit. Biopsies results proved that the two malignancies were in fact separate entities and not a consequence of metastasis from a primary source.