骨髓瘤前期疾病的分子成像。

Molecular imaging in myeloma precursor disease.

机构信息

Molecular Imaging Program, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.

出版信息

Semin Hematol. 2011 Jan;48(1):22-31. doi: 10.1053/j.seminhematol.2010.11.006.

Abstract

Multiple myeloma (MM) is consistently preceded by its pre-malignant states, monoclonal gammopathy of undetermined significance (MGUS) and/or smoldering multiple myeloma (SMM). By definition, precursor conditions do not exhibit end-organ disease (anemia, hypercalcemia, renal failure, skeletal lytic lesions, or a combination of these). However, new imaging methods are demonstrating that some patients in the MGUS or SMM category are exhibiting early signs of MM. Although MGUS/SMM patients are currently defined as low-risk versus high-risk based on clinical markers, we currently lack the ability to predict the individual patient's risk of progression from MGUS/SMM to MM. Given that the presence of gross lytic bone lesions is a hallmark of MM, it is reasonable to believe that less severe bone changes defined by more sensitive imaging may be predictive of MM progression. Indeed, since bone disease is such an essential aspect of MM, imaging techniques directed at the detection of early bone lesions, have the potential to become increasingly more useful in the setting of MGUS/SMM. Current guidelines for the radiological assessment of MM still recommend the traditional skeletal survey, although its limitations are well documented, especially in early phases of the disease when radiographs can significantly underestimate the extent of bone lesions and bone marrow involvement. Newer, more advanced imaging modalities, with higher sensitivities, including whole-body low-dose computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET) are being employed. Also various imaging techniques have been used to provide an assessment of bone involvement and identify extra-osseous disease. This review emphasizes the current state of the art and emerging imaging methods, which may help to better define high-risk versus low-risk MGUS/SMM. Ultimately, improved imaging could allow more tailored clinical management, and, most likely play an important role in the development of future treatment strategies for high-risk precursor disease.

摘要

多发性骨髓瘤(MM)通常先于其恶性前体状态,即意义未明的单克隆丙种球蛋白血症(MGUS)和/或冒烟型多发性骨髓瘤(SMM)。根据定义,前体疾病不表现为终末器官疾病(贫血、高钙血症、肾衰竭、溶骨性骨病变,或这些疾病的组合)。然而,新的成像方法表明,MGUS 或 SMM 类别中的一些患者正在表现出 MM 的早期迹象。尽管 MGUS/SMM 患者目前根据临床标志物定义为低风险与高风险,但我们目前缺乏预测个体患者从 MGUS/SMM 进展为 MM 的风险的能力。鉴于广泛的溶骨性骨病变是 MM 的标志,因此有理由相信,通过更敏感的成像定义的不太严重的骨变化可能具有预测 MM 进展的作用。事实上,由于骨骼疾病是 MM 的一个重要方面,因此针对早期骨病变的检测的成像技术,在 MGUS/SMM 中具有潜在的越来越重要的作用。目前 MM 的放射学评估指南仍建议使用传统的骨骼检查,尽管其局限性已有充分记录,尤其是在疾病的早期阶段,那时 X 光片可能会大大低估骨病变和骨髓受累的程度。具有更高灵敏度的更新、更先进的成像方式,包括全身低剂量 CT(CT)、磁共振成像(MRI)和正电子发射断层扫描(PET),正在被采用。此外,各种成像技术也被用于评估骨骼受累情况并识别骨外疾病。这篇综述强调了当前的技术水平和新兴的成像方法,这些方法可能有助于更好地定义高风险与低风险的 MGUS/SMM。最终,改进的成像可以实现更个性化的临床管理,并且很可能在高危前体疾病的未来治疗策略的发展中发挥重要作用。

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