Sarcoidosis Presenting as a Right Paraesophageal Mass Abutting the Left Atrium.

We herein report a unique case of sarcoidosis in a 44-year-old Caucasian female. The patient was initially evaluated for hematochezia and diagnosed with diverticulitis after computed tomography (CT) scan of the abdomen and pelvis. This imaging also incidentally showed a large mass abutting the esophagus. Further imaging of the mass revealed widespread lymphadenopathy in the thorax without any respiratory or classic B symptoms present. The remaining workup caused concern for possible lung or hematologic malignancy. Following biopsy of a thoracic lymph node, the patient was diagnosed with sarcoidosis. This patient met only one of the usual demographic criteria associated with sarcoidosis and none of the lab criteria. While sarcoidosis is typically a benign disease, this case exemplifies how it may appear as a more sinister entity and warrants extensive workup to rule out malignancy.