#247 SPEP It Up: MGUS, Myeloma, and Immunology, Oh My!
Dec 21, 2020
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Dr. Jorge Castillo from Harvard and Dana Farber joins the hosts to discuss topics such as immunology basics, limitations of the SPEP, when to suspect MGUS and myeloma, and how to talk to patients about these conditions. They also touch on Waldenstrom's and amyloidosis, providing valuable clinical insights and diagnostic frameworks. Tune in to learn more about these fascinating topics in internal medicine.
Plasma cell dyscrasias, such as myeloma, Waldenstrom's macroglobulinemia, and amyloidosis, are characterized by abnormal production of proteins known as paraproteins.
Diagnosis of plasma cell dyscrasias involves various tests, including serum protein electrophoresis (S-PEP), immunofixation, and urine protein electrophoresis (U-PEP).
Regular monitoring and follow-up are essential for optimizing treatment outcomes in plasma cell dyscrasias.
Deep dives
Different types of plasma cell dyscrasias
Plasma cell dyscrasias, such as myeloma, Waldenstrom's macroglobulinemia, and amyloidosis, are characterized by abnormal production of proteins known as paraproteins. Myeloma is the most common type and is associated with symptoms like hypercalcemia, renal dysfunction, anemia, and bone lesions. Waldenstrom's macroglobulinemia typically presents with anemia, hyperviscosity-related symptoms, and neuropathy, while amyloidosis primarily affects the kidneys, heart, and nerves.
Diagnosing plasma cell dyscrasias
Diagnosis of plasma cell dyscrasias involves various tests, including serum protein electrophoresis (S-PEP), immunofixation, and urine protein electrophoresis (U-PEP). These tests help identify abnormal paraproteins and assess their levels. Additional tests, such as complete blood count and metabolic panel, may be necessary to evaluate kidney function, calcium levels, and anemia. Bone marrow biopsy and imaging studies, like skeletal surveys, may be performed to further evaluate specific conditions.
Treatment and management
Treatment for plasma cell dyscrasias depends on the specific condition and its severity. Myeloma is often treated with non-chemotherapy approaches, including proteasome inhibitors and antibodies, while Waldenstrom's macroglobulinemia may require a combination of chemotherapy and other targeted therapies. Amyloidosis usually requires a biopsy of affected tissues to determine the type, followed by appropriate treatment, which can involve chemotherapy and organ-specific approaches. Regular monitoring and follow-up are essential for optimizing treatment outcomes.
Hyperviscosity in Waldenstrom's macroglobulinemia
Hyperviscosity is a potential complication of Waldenstrom's macroglobulinemia, characterized by the thickening of blood due to high levels of immunoglobulin M (IgM). Symptoms of hyperviscosity can include recurrent nosebleeds, headaches, and blurred vision. Management typically involves plasma exchange to reduce blood viscosity and alleviate symptoms.
Importance of patient participation in research
Patients play a crucial role in advancing the understanding and treatment of plasma cell dyscrasias by participating in research. Their contribution through sample donations, participation in clinical trials, and providing insights into their experiences can greatly contribute to scientific advancements and improve patient outcomes.
On this episode, Dr. Jorge Castillo (Harvard, Dana Farber) walks us through some immunology basics, teaches us the limitations of the SPEP, plus some additional tests that complement it (think Immunofixation), shares his clinical gestalt about when to suspect MGUS, Myeloma, Waldenstrom’s, and Amyloidosis--and finally, how to talk to patients about them. If you, like Stuart, have ever wondered what on earth to do with that pesky free light chain ratio or the SPEP that so often gets inboxed to you without explanation, then fear not, Dr Castillo has your back!
Hosts: Matthew Watto MD, FACP; Stuart Brigham MD, FACP, Nora Taranto MD
Editor: Matthew Watto MD, FACP ; Clair Morgan of nodderly.com
Reviewer: Jooho Chung MD, PhD
Guest: Jorge Castillo MD
Sponsor: Panacea Financial
This episode is supported by Panacea Financial, digital banking built for doctors, by doctors. At Panacea Financial you can have your own free personal banker and a support team that works around the clock- just like you do. Open your free checking account today at panaceafinancial.com
Panacea Financial, a Division of Sonabank, Member FDIC
Sponsor: VCU Health CE
We are excited to announce that the Curbsiders are now partnering with VCU Health Continuing Education to offer FREE continuing education credits for physicians and other healthcare professionals. Check out curbsiders.vcuhealth.org and create your account!
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