Abstract

Histiocytic sarcoma is a rare and frequently missed diagnosis. With unusual and varied presentations, it typically indicates a rapid patient decline and poor outcomes. The diagnosis requires a high degree of clinical suspicion. In this case, we explore the progression of illness in a 56-year-old white male who initially presented with a 2-week history of soft-tissue nodules scattered throughout his head, neck, torso, and limbs, as well as shortness of breath and knee pain. After a thorough workup including computed tomography imaging of the neck, chest, and lower extremity, as well as a biopsy of a nodule with immunoperoxidase staining, a diagnosis of histiocytic sarcoma was established. Due to the severity of his malignancy, his hospital course was complicated by a deep vein thrombosis. Clinicians should be mindful of the risk of acute decompensation in such cases and can employ the various tenets of osteopathic theory to improve patient quality of life. Depending on the severity of illness, physicians may proceed to facilitate end-of-life measures with grace and dignity.


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