Multiple Myeloma, Vertebral Fracture
Conditions
Keywords
Bone marrow fat, Bone fragility, Fat quantification
Brief summary
Multiple myeloma is a disease that causes increased bone fragility which is often revealed or complicated by vertebral fractures. Invasion of bone marrow by tumor plasma cells leads to bone destruction and reduced fat fraction. The main objective is to assess the correlation between vertebral bone marrow fat fraction and bone fragility represented by a severity score of vertebral fractures. The secondary objective is to assess the correlation with clinical and biological prognostic factors and scores..
Detailed description
Patients treated with vertebroplasty will be included during the period of the study, retrospectively or prospectively. Mains collected data are represented by : * Bone marrow fat fraction determined by MRI * Severity score for vertebral fractures * Clinical prognostic factors * Biological prognostic factors * Clinico-biological scores Descriptive statistics and correlation analyses will be performed between the measured parameters.
Interventions
OTHERBone marrow fat quantification by MRI
Bone marrow fat quantification by MRI at the moment of the diagnosis of vertebral fracture before treatment by vertebroplasty
Sponsors
Assistance Publique - Hôpitaux de Paris
Study design
Observational model
COHORT
Time perspective
OTHER
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patients followed for multiple myelomas in the Lariboisière/Saint-Louis/Fernand-Widal hospital group * vertebral fractures treated by vertebroplasty from January 2017 to December 2021 * recent clinical and biological data available at the time of imaging and fracture events
Exclusion criteria
* Factors modifying the bone marrow fat fraction (extensive radiotherapy) * Lack of recent clinical or biological data compared to imaging examinations
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Percentage of bone marrow fat in vertebral bone marrow | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Measured from Dixon sequences on MRI exams performed in routine care, for the assessment of the relationship between bone marrow vertebral fat content and the severity of the vertebral fractures |
| Vertebral fracture severity score | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Score established according to morphological criteria determined by MRI/computerized tomography scan, based on the Genant classification. Calculation of sum of the points awarded as follows: vertebral fracture on osteolytic lesion = 3; osteolytic lesion with high fracture risk = 0; other fracture related to increased bone fragility, scale 1-3 according to Genant's criteria, 3 representing the worst situation; normal vertebra = 0. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Weight/body mass index (BMI) | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | The Body Mass Index is calculated as the ratio between the weight measured in kilograms and the square of the height measured in meters |
| Age at the moment of the vertebral fracture | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Age in years at the moment of the vertebral fracture |
| Type of the monoclonal component | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Corresponding the type of the heavy (IgG, IgA, IgD, IgE or IgM) and/or the light chain (κ or λ) of the monoclonal immunoglobulin protein |
| Serum rate of the monoclonal component | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Serum rate of the monoclonal immunoglobulin protein in g/L |
| Medullary plasmacytosis | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Percentage of plasma cells assessed by bone marrow aspiration |
| Presence of anaemia | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Defined by hemoglobin value \< 100g/L |
| Presence of hypercalcemia | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Defined by serum calcium \> 2.75mmol/L |
| Sex | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Male or female |
| Presence of amyloidosis | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Presence of amyloid deposits revealed by tissue biopsy |
| Multiple myeloma stage according to the Salmon-Durie staging System | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | The Salmon-Durie classification in three stages according to the absence (I) or the presence (III) of the following criteria: anemia (hemoglobin value \< 100g/L); hypercalcemia (serum calcium \> 2.75mmol/L); amyloidosis (amyloid deposits revealed by biopsy); bone lesion at imaging. Concerning the serum rate of the monoclonal component, IgA \< 30g/L and IgG \< 50 g/L are considered stage I, and IgA \> 50g/L and IgG \> 70 g/L are considered stage III. The intermediate stage II is based on the rate of the blood monoclonal component (from 30 to 50 g/L for IgA and from 50 to 70 g/L for IgG) . The subclassification depends on the absence (A) or the presence of renal failure related to myeloma (B) (defined by creatinine clearance \< 40mL/min or serum creatinine \> 177µmol/L). |
| Multiple myeloma stage according to the International Staging System (ISS) | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | To determine the International Staging System score (ISS) in three stages with stage I corresponding to serum beta-2-microglobulin \< 3.5 mg/L and serum albumin ≥ 35 g/L, stage III corresponding to beta-2-microglobulin ≥ 5.5 mg/L, and stage II when not stage I or III |
| Serum rate of Lactate dehydrogenase | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Measured in U/L; serum lactate dehydrogenase is a poor prognosis factor when elevated (\> 300U/L) |
| Salmon-Durie Plus classification | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Based of the MRI pattern of multiple myeloma that determine three stages : stage I (0-4 focal lesions), stage II (5-20 focal lesions), stage III (\>20 focal lesions). The subclassification depends on the absence (A) or the absence of extramedullary disease (B) (anemia, hypercalcemia, renal failure, amyloidosis) |
| Type of bone damage on CT scan | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Classified as normal, focal lesion, diffuse osteopenia, focal lesion with diffuse osteopenia |
| Vertebral radiodensity | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Measured by a CT scan in Hounsfield Units |
| Presence of renal failure related to myeloma | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Defined by a creatinine clearance \< 40mL/min or serum creatinine \> 177µmol/L |
| Age at the diagnosis of multiple myeloma | At the moment of the diagnosis of the vertebral fracture before treatment by vertebroplasty | Age in years at the diagnosis of multiple myeloma |
Countries
France
Contacts
Primary ContactGregoire ATTANE, MD
Outcome results
None listed