Case Report of IgM Multiple Myeloma: Diagnosing a Rare Hematologic Entity.

IgM multiple myeloma is an exceedingly rare hematologic entity comprising only less than 0.5% of multiple myeloma cases. Given the rarity of this disorder, it makes it a challenge to differentiate from other more prevalent hematologic disorders like Waldenstrom macroglobulinemia. These 2 diseases have the common finding of an IgM monoclonal gammopathy and distinguishing between these 2 diagnoses is of great importance given that therapy and prognosis differ significantly. This report illustrates the case of a 64-year-old man who presented with IgM lambda monoclonal gammopathy in whom signs, symptoms, laboratories, and imaging were initially thought to be consistent with Waldenstrom macroglobulinemia. Upon further analysis, which included bone marrow biopsy, flow cytometry, immunohistochemistry, fluorescence in situ hybridization, and MYD88 (L265P) gene mutation analysis, the rare diagnosis of IgM multiple myeloma was confirmed. As highlighted by this patient's case, reaching the diagnosis of IgM multiple myeloma can be a difficult task which requires a high index of suspicion and accurate diagnostic methods. By using the approach detailed in this report, more cases of IgM multiple myeloma can be diagnosed early, which in turn may lead to earlier treatment and better outcomes.

The Zika Virus: An Association to Guillain-Barré Syndrome in the United States - A Case Report.

Case of a 37 year-old Puerto Rican male with no past medical history who was admitted to the hospital after developing paresthesia in the upper and lower extremities with associated skin rash, weakness, and dysautonomia. After rigorous analysis of the clinical patterns, neurologic manifestations, laboratory workups, CSF analysis, and nerve conduction studies we conclude the existence of a strong relationship between the Zika virus and the Guillain-Barré syndrome. The patient recovered promptly and his response to treatment was excellent.