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Gordon ER, Chen C, Adeuyan O, Lapolla BA, Trager MH, Fahmy LM, Schreidah CM, Wetter DA, Geskin LJ. Retrospective analysis of multiple myeloma drug use in cutaneous toxicity of monoclonal gammopathy of undetermined significance. J Am Acad Dermatol 2024; 91:129-130. [PMID: 38479611 DOI: 10.1016/j.jaad.2024.02.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/16/2024] [Accepted: 02/28/2024] [Indexed: 04/05/2024]
Affiliation(s)
- Emily R Gordon
- Columbia University Vagelos College of Physicians and Surgeons, New York, New York
| | - Caroline Chen
- Columbia University Vagelos College of Physicians and Surgeons, New York, New York
| | - Oluwaseyi Adeuyan
- Columbia University Vagelos College of Physicians and Surgeons, New York, New York
| | - Brigit A Lapolla
- Department of Dermatology, Columbia University Irving Medical Center, New York, New York
| | - Megan H Trager
- Department of Dermatology, Columbia University Irving Medical Center, New York, New York
| | - Lauren M Fahmy
- Columbia University Vagelos College of Physicians and Surgeons, New York, New York
| | - Celine M Schreidah
- Columbia University Vagelos College of Physicians and Surgeons, New York, New York
| | - David A Wetter
- Department of Dermatology, Mayo Clinic, Rochester, Minnesota
| | - Larisa J Geskin
- Columbia University Vagelos College of Physicians and Surgeons, New York, New York; Department of Dermatology, Columbia University Irving Medical Center, New York, New York.
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2
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Saeidi V, Garimella V, Shaji K, Wetter DA, Davis MDP, Todd A, Dutz J, Alavi A. Monoclonal gammopathy in the setting of Pyoderma gangrenosum. Arch Dermatol Res 2024; 316:268. [PMID: 38795175 DOI: 10.1007/s00403-024-03098-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 03/28/2024] [Accepted: 04/26/2024] [Indexed: 05/27/2024]
Abstract
Pyoderma gangrenosum (PG) is a neutrophilic dermatosis characterized by ulcerative painful lesions with violaceous undermined borders. Up to 75% of PG cases develop in association with an underlying systemic disease. Monoclonal gammopathy is reportedly a concomitant condition with PG, with studies indicating immunoglobulin (Ig) A gammopathy as the most common. Whether gammopathy is associated with PG or is an incidental finding has been debated. We sought to investigate the association and characteristics of gammopathy in patients with PG. We retrospectively identified PG patients at our institution from 2010 to 2022 who were screened for plasma cell dyscrasia. Of 106 patients identified, 29 (27%) had a gammopathy; subtypes included IgA (41%), IgG (28%), and biclonal (IgA and IgG) (14%). Mean age was similar between those with and without gammopathy (60.7 vs. 55.9 years; P = .26). In addition, hematologic or solid organ cancer developed in significantly more patients with vs. without gammopathy (8/29 [28%] vs. 5/77 [6%]; P = .003). Among the subtypes of gammopathy, IgG monoclonal gammopathy had the highest proportion of patients with subsequent cancer development (4 of 8 patients, 50%). Study limitations include a retrospective, single-institution design with a limited number of patients. Overall, our data show a high prevalence of gammopathy in patients with PG; those patients additionally had an increased incidence of cancer, especially hematologic cancer.
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Affiliation(s)
- Vahide Saeidi
- Department of Dermatology, Mayo Clinic, Rochester, MN, Canada
| | | | - Kumar Shaji
- Department of Hematology, Mayo Clinic, Rochester, MN, USA
| | - David A Wetter
- Department of Dermatology, Mayo Clinic, Rochester, MN, Canada
| | | | - Austin Todd
- Division of Clinical Trials and Biostatistics, Mayo Clinic, Rochester, MN, USA
| | - Jan Dutz
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, BC, Canada
| | - Afsaneh Alavi
- Department of Dermatology, Mayo Clinic, Rochester, MN, Canada.
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3
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King HL, Benedetti GB, Keller JJ, DeLoughery TG, Shatzel JJ, Martens KL. Dermatologic manifestations of hematologic disorders. Ann Hematol 2024:10.1007/s00277-024-05761-5. [PMID: 38662204 DOI: 10.1007/s00277-024-05761-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 04/14/2024] [Indexed: 04/26/2024]
Abstract
Distinguishing key morphologic features and understanding the pathophysiology of common cutaneous manifestations of hematologic disorders is essential to ensure prompt and appropriate treatment. In fact, classic cutaneous signs may provide the first clue to the diagnosis of an underlying hematologic disease. Disorders of coagulation, vascular abnormalities, or cutaneous infiltration and deposition are responsible for the underlying pathophysiology of cutaneous manifestations in the majority of cases. Hematologists often feel ill-equipped in identifying morphologic changes in the skin. Thus, the purpose of this review is to provide a comprehensive overview of classic cutaneous manifestations and diagnostic considerations of the associated hematologic conditions. Though there is a specific focus on non-malignant disorders, those straddling the spectrum of malignancy are also discussed. In many disease states, the skin may serve as an important marker of an emerging hematologic disorder, so close collaboration and multidisciplinary input remain essential to provide optimal and timely care for these patients.
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Affiliation(s)
- Hannah L King
- Department of Medicine, Oregon Health & Science University, Portland, OR, USA
| | | | - Jesse J Keller
- Department of Dermatology, Oregon Health & Science University, Portland, OR, USA
| | - Thomas G DeLoughery
- Division of Hematology and Medical Oncology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road Mail Code: OC14HO, 97239, Portland, OR, USA
| | - Joseph J Shatzel
- Division of Hematology and Medical Oncology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road Mail Code: OC14HO, 97239, Portland, OR, USA
| | - Kylee L Martens
- Division of Hematology and Medical Oncology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road Mail Code: OC14HO, 97239, Portland, OR, USA.
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4
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Gordon ER, Chen C, Trager MH, Adeuyan O, Lapolla BA, Fahmy LM, Schreidah CM, Wetter DA, Geskin LJ. Gammopathic dermopathy: characterization of cutaneous MGUS. Leuk Lymphoma 2024:1-8. [PMID: 38581379 DOI: 10.1080/10428194.2024.2336046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 03/24/2024] [Indexed: 04/08/2024]
Abstract
Monoclonal Gammopathy of Undetermined Significance (MGUS) is a clonal plasma cell disorder that is considered preneoplastic, asymptomatic, and only requiring observation. However, MGUS may result in cutaneous complications, which are poorly understood, causing treatment delays and patient suffering. We present 30 patients with cutaneous findings associated with MGUS, characterizing clinical presentations, isoforms, treatments, and outcomes. These included: MGUS-associated 'rashes' (pruritic eczematous rashes), reactive and mucin-depositional conditions (pyoderma gangrenosum, scleromyxedema), M-protein-related deposition disorders (POEMS syndrome, Waldenstrom macroglobulinemia), and cutaneous lymphomas. Twelve of 30 (40%) patients received multiple myeloma drugs (MMDs). Eleven (92%) patients improved, and those not receiving MMDs rarely improved, suggesting that MMDs have efficacy for cutaneous manifestations of MGUS. Therefore, trialing MMDs may be warranted for patients with MGUS not responding to other therapies. Moreover, evaluation for monoclonal gammopathy in elderly patients with intractable pruritus or other chronic skin conditions that are non-responsive to skin-directed therapies should be considered.
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Affiliation(s)
- Emily R Gordon
- Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
| | - Caroline Chen
- Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
| | - Megan H Trager
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Oluwaseyi Adeuyan
- Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
| | - Brigit A Lapolla
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Lauren M Fahmy
- Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
| | - Celine M Schreidah
- Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
| | - David A Wetter
- Department of Dermatology, Mayo Clinic, Rochester, MN, USA
| | - Larisa J Geskin
- Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
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5
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Agrawal S, Leung N, Drage L. Scleromyxedema and Underlying Multiple Myeloma. Mayo Clin Proc 2024; 99:283-284. [PMID: 38309938 DOI: 10.1016/j.mayocp.2023.08.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/10/2023] [Accepted: 08/23/2023] [Indexed: 02/05/2024]
Affiliation(s)
- Shruti Agrawal
- Department of Dermatology, Mayo Clinic, Rochester, MN, USA; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.
| | - Nelson Leung
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA; Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | - Lisa Drage
- Department of Dermatology, Mayo Clinic, Rochester, MN, USA
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6
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Murina A, Allen A. Paraneoplastic Dermatoses and Cutaneous Metastases. Clin Geriatr Med 2024; 40:177-195. [PMID: 38000859 DOI: 10.1016/j.cger.2023.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2023]
Abstract
Paraneoplastic syndromes include a variety of cutaneous presentations that have an associated internal malignancy. Some syndromes have a strong correlation to specific internal malignancies, whereas others are associated with a multitude of tumors. There are many cutaneous manifestations that suggest hematologic disorders, which will be reviewed in detail. Cutaneous metastases are commonly from breast and lung cancers and can present as nodules, vascular lesions, eczematous dermatitis, or inflammatory lesions. The most common histologic presentation of cutaneous metastasis is that of a dermal-based or subcutaneous-based nodule with sparing of the epidermis. Determination of origin of tumor requires immunohistochemistry and clinical correlation.
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Affiliation(s)
- Andrea Murina
- Department of Dermatology, Tulane University School of Medicine, 1430 Tulane Avenue #8036, New Orleans, LA 70112, USA.
| | - Ashley Allen
- Department of Dermatology, Tulane University School of Medicine, 1430 Tulane Avenue #8036, New Orleans, LA 70112, USA
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7
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Zhao P, Luu LA, Gish TJ, Raghavan SS, Gru AA, Zlotoff BJ. Widespread livedo racemosa. Clin Exp Dermatol 2023; 48:945-948. [PMID: 37052078 DOI: 10.1093/ced/llad138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 04/03/2023] [Accepted: 04/10/2023] [Indexed: 04/14/2023]
Abstract
A 41-year-old woman with monoclonal gammopathy of undetermined significance presented with a 1-year history of livedo racemosa that started on one arm after receiving the Pfizer BioNTech COVID-19 vaccine. Her primary care physician initially thought it was a benign reaction to the COVID-19 vaccine as her symptoms were on the same arm as the site of injection. However, the livedo racemosa subsequently became more widespread after COVID-19 infection.
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Affiliation(s)
- Patricia Zhao
- University of Virginia School of Medicine, Charlottesville, VA, USA
| | | | - Tappy J Gish
- Pathology, University of Virginia Medical Center, Charlottesville, VA, USA
| | - Shyam S Raghavan
- Pathology, University of Virginia Medical Center, Charlottesville, VA, USA
| | - Alejandro A Gru
- Pathology, University of Virginia Medical Center, Charlottesville, VA, USA
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Theodorakakou F, Fotiou D, Gavriatopoulou M, Ntanasis-Stathopoulos I, Spiliopoulou V, Malandrakis P, Migkou M, Eleutherakis-Papaiakovou E, Kanellias N, Terpos E, Dimopoulos MA, Kastritis E. Prevalence of MGCS Among Patients With Monoclonal Gammopathies. Hemasphere 2023; 7:e908. [PMID: 37275739 PMCID: PMC10234460 DOI: 10.1097/hs9.0000000000000908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 05/03/2023] [Indexed: 06/07/2023] Open
Affiliation(s)
- Foteini Theodorakakou
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
| | - Despina Fotiou
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
| | - Maria Gavriatopoulou
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
| | | | - Vassiliki Spiliopoulou
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
| | - Panagiotis Malandrakis
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
| | - Magdalini Migkou
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
| | | | - Nikolaos Kanellias
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
| | - Evangelos Terpos
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
| | - Meletios A. Dimopoulos
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
| | - Efstathios Kastritis
- Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, Greece
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9
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Chen LY, Drayson M, Bunce C, Ramasamy K. Monoclonal gammopathy of increasing significance: time to screen? Haematologica 2023; 108:1476-1486. [PMID: 36373250 PMCID: PMC10233333 DOI: 10.3324/haematol.2022.281802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 10/28/2022] [Indexed: 11/11/2022] Open
Abstract
Monoclonal gammopathy (MG) is a frequently detected clonal B-cell or plasma-cell disorder. Importantly, every multiple myeloma (MM) case is preceded by MG. Although clinical algorithms now allow earlier treatment of patients with biomarkers of malignancy before MM-induced tissue damage (CRAB) occurs, most patients are still diagnosed late. It is important to revisit how MG should be managed in clinical practice and whether screening is required. As the prevalence of MG and other medical co-morbidities both rise with increasing age, the degree of contribution of MG to disease states other than malignant progression is often unclear. This can lead to monitoring lapses and under recognition of the organ dysfunction that can occur with monoclonal gammopathy of clinical significance (MGCS). Therefore, models of progression to MM and/or MGCS require further refinement. While MG is currently detected incidentally, a case for screening has been made with ongoing studies in this area. Screening has the potential benefit of earlier detection and prevention of both MGCS and delayed MM presentations, but important drawbacks include the psychosocial impact on individuals and resource burden on healthcare services. MG terminology should transition alongside our increasing understanding of the condition and genomic characterization that have already begun to revise the MG nomenclature. The biology of MG has been poorly understood and is often inferred from the biology of MM, which is unhelpful. We review the literature and case for MG screening in this paper. In particular, we highlight areas that require focus to establish screening for MG.
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Affiliation(s)
- Lucia Y Chen
- Oxford University Hospitals NHS Foundation Trust
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10
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Huang H, Qian SX. Lichen myxedematosus associated with monoclonal gammopathy of undetermined significance: A case report and literature review. Front Med (Lausanne) 2023; 10:1118555. [PMID: 36968834 PMCID: PMC10032400 DOI: 10.3389/fmed.2023.1118555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 02/20/2023] [Indexed: 03/10/2023] Open
Abstract
Lichen myxedematosus (LM) is an idiopathic cutaneous mucinosis disorder, and monoclonal gammopathy of undetermined significance (MGUS) is a preneoplastic plasma cell disease with a monoclonal increase in globulin. Patients with LM combined with monoclonal gammopathy are normally diagnosed with scleromyxedema. However, we report a case of generalized papules combined with MGUS in a 78-year-old man who was eventually diagnosed with atypical or intermediate forms of LM because it only involved the skin, and the pathological type was not consistent with scleromyxedema. Few cases of atypical or intermediate forms of LM have been reported, so the course of atypical or intermediate forms of LM is unpredictable. We report the diagnosis and treatment of a case of atypical forms of LM to discuss the current understanding of the disease, hoping to provide a reference for clinical research on this disease.
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11
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Kaur J, Valisekka SS, Hameed M, Bandi PS, Varma S, Onwughalu CJ, Ibrahim H, Mongia H. Monoclonal Gammopathy of Undetermined Significance: A Comprehensive Review. CLINICAL LYMPHOMA, MYELOMA & LEUKEMIA 2023; 23:e195-e212. [PMID: 36966041 DOI: 10.1016/j.clml.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/13/2023] [Accepted: 02/16/2023] [Indexed: 02/24/2023]
Abstract
Monoclonal Gammopathy of Undetermined Significance (MGUS) is an asymptomatic premalignant plasma cell dyscrasia with a predominate rise of the IgG immunoglobulin fraction without end-organ damage, often diagnosed incidentally. Despite its progression into various subsequent forms of hematological malignancies, MGUS remains underdiagnosed. A literature search was conducted using the Medline, Cochrane, Embase, and Google Scholar databases, including articles published until December 2022. Keywords used encompassed "Monoclonal Gammopathy of Undetermined Significance," "Plasma Cell dyscrasia," "Monoclonal gammopathy of renal significance," and "IgM Monoclonal gammopathy of Undetermined Significance," This study aimed to conduct a critical review to update knowledge regarding the pathophysiology, risk factors, clinical features, diagnostic protocols, complications, and current and novel treatments for MGUS. We recommend a multidisciplinary approach to manage MGUS due to the complexity of the illness's etiology, diagnosis, and therapy. This comprehensive review also highlights future prospects, such as developing screening protocols for at-risk populations, prevention of disease progression by early diagnosis through genome-wide association studies, and management using Daratumumab and NSAIDs.
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Affiliation(s)
- Jasneet Kaur
- Internal Medicine, Nassau University Medical Center, East Meadow, New York, USA..
| | | | - Maha Hameed
- Internal Medicine, Florida State University/Sarasota Memorial Hospital, Sarasota, Florida, USA.
| | | | | | | | - Hany Ibrahim
- Ain Shams University, Faculty of Medicine, Cairo, Egypt.
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Oganesyan A, Gregory A, Malard F, Ghahramanyan N, Mohty M, Kazandjian D, Mekinian A, Hakobyan Y. Monoclonal gammopathies of clinical significance (MGCS): In pursuit of optimal treatment. Front Immunol 2022; 13:1045002. [PMID: 36505449 PMCID: PMC9728929 DOI: 10.3389/fimmu.2022.1045002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 11/07/2022] [Indexed: 11/24/2022] Open
Abstract
Monoclonal gammopathy of clinical significance (MGCS) represents a new clinical entity referring to a myriad of pathological conditions associated with the monoclonal gammopathy of undetermined significance (MGUS). The establishment of MGCS expands our current understanding of the pathophysiology of a range of diseases, in which the M protein is often found. Aside from the kidney, the three main organ systems most affected by monoclonal gammopathy include the peripheral nervous system, skin, and eye. The optimal management of these MGUS-related conditions is not known yet due to the paucity of clinical data, the rarity of some syndromes, and limited awareness among healthcare professionals. Currently, two main treatment approaches exist. The first one resembles the now-established therapeutic strategy for monoclonal gammopathy of renal significance (MGRS), in which chemotherapy with anti-myeloma agents is used to target clonal lesion that is thought to be the culprit of the complex clinical presentation. The second approach includes various systemic immunomodulatory or immunosuppressive options, including intravenous immunoglobulins, corticosteroids, or biological agents. Although some conditions of the MGCS spectrum can be effectively managed with therapies aiming at the etiology or pathogenesis of the disease, evidence regarding other pathologies is severely limited to individual patient data from case reports or series. Future research should pursue filling the gap in knowledge and finding the optimal treatment for this novel clinical category.
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Affiliation(s)
- Artem Oganesyan
- Department of Hematology and Transfusion Medicine, National Institute of Health, Yerevan, Armenia,Department Of Adult Hematology, Hematology Center after Prof. R. Yeolyan, Yerevan, Armenia,*Correspondence: Artem Oganesyan,
| | - Andrew Gregory
- Wayne State University School of Medicine, Detroit, MI, United States
| | - Florent Malard
- Department of Clinical Hematology and Cellular Therapy, INSERM, Saint-Antoine Research Centre, Assistance Publique-Hôpitaux de Paris, Hôpital Saint Antoine, Paris, France
| | - Nerses Ghahramanyan
- Department Of Adult Hematology, Hematology Center after Prof. R. Yeolyan, Yerevan, Armenia
| | - Mohamad Mohty
- Department of Clinical Hematology and Cellular Therapy, INSERM, Saint-Antoine Research Centre, Assistance Publique-Hôpitaux de Paris, Hôpital Saint Antoine, Paris, France
| | - Dickran Kazandjian
- Myeloma Program, Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL, United States
| | - Arsène Mekinian
- Department of Internal Medicine (DMU i3), Sorbonne University, Assistance Publique-Hôpitaux de Paris, Hôpital Saint Antoine, Paris, France,French-Armenian Clinical Research Center, National Institute of Health, Yerevan, Armenia
| | - Yervand Hakobyan
- Department of Hematology and Transfusion Medicine, National Institute of Health, Yerevan, Armenia,Department Of Adult Hematology, Hematology Center after Prof. R. Yeolyan, Yerevan, Armenia
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13
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Monoclonal Gammopathies of Clinical Significance: A Critical Appraisal. Cancers (Basel) 2022; 14:cancers14215247. [PMID: 36358666 PMCID: PMC9659226 DOI: 10.3390/cancers14215247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/15/2022] [Accepted: 10/24/2022] [Indexed: 11/26/2022] Open
Abstract
Simple Summary Monoclonal gammopathy of clinical significance (MGCS) refers to a recently coined term describing a complex and heterogeneous group of nonmalignant monoclonal gammopathies. These patients are characterized by the presence of a commonly small clone and the occurrence of symptoms that may be associated with the clone or with the monoclonal protein through diverse mechanisms. This is an evolving, challenging, and rapidly changing field. Patients are classified according to the key organ or system involved, with kidneys, skin, nerves, and eyes being the most frequently affected. However, multiorgan involvement may be the most relevant clinical feature at the presentation or during the course. This review delves into the definition, history, differential diagnosis, classification, prognosis, and treatment of this group of entities by analyzing the evidence accumulated to date from a critical perspective. Abstract Monoclonal gammopathies of clinical significance (MGCSs) represent a group of diseases featuring the association of a nonmalignant B cells or plasma cells clone, the production of an M-protein, and singularly, the existence of organ damage. They present a current framework that is difficult to approach from a practical clinical perspective. Several points should be addressed in order to move further toward a better understanding. Overall, these entities are only partially included in the international classifications of diseases. Its definition and classification remain ambiguous. Remarkably, its real incidence is unknown, provided that a diagnostic biopsy is mandatory in most cases. In fact, amyloidosis AL is the final diagnosis in a large percentage of patients with renal significance. On the other hand, many of these young entities are syndromes that are based on a dynamic set of diagnostic criteria, challenging a timely diagnosis. Moreover, a specific risk score for progression is lacking. Despite the key role of the clinical laboratory in the diagnosis and prognosis of these patients, information about laboratory biomarkers is limited. Besides, the evidence accumulated for many of these entities is scarce. Hence, national and international registries are stimulated. In particular, IgM MGCS deserves special attention. Until now, therapy is far from being standardized, and it should be planned on a risk and patient-adapted basis. Finally, a comprehensive and coordinated multidisciplinary approach is needed, and specific clinical trials are encouraged.
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