User login
MADRID – Evidence for always using imaging in an adjunctive role to clinical findings in the diagnosis and assessment of axial spondyloarthritis (axSpA) continues to grow, two experts agreed in a scientific session at the European Congress of Rheumatology.
“Imaging has to be understood in the context of other findings. With the patient history, the physical examination, and the laboratory results, the value of imaging improves substantially. Therefore, before an image is ordered it is important to ask how likely is it that a patient has axial spondylitis,” said Floris A. van Gaalen, MD, PhD, of Leiden (Netherlands) University Medical Center.
As one of the experts who participated in the scientific session, Dr. van Gaalen focused specifically on the value of x-ray and MRI in the diagnosis of axSpA, emphasizing their limited value if interpreted without clinical context. He explained that even highly experienced radiologists are fooled, particularly at early stages of disease.
Although the quality of imaging has been increasing steadily, “there is no cookbook approach with which you can guarantee a diagnosis of spondyloarthritis. Imaging can be valuable, but there is a risk of false positives because features on imaging, such as bone marrow edema, are shared with other sources of back pain,” Dr. van Gaalen said.
Considering the importance of context, Dr. van Gaalen advised clinicians against reading the radiology report without evaluating the images themselves. He said the features on imaging make more sense when they are considered at the same time as the patient’s history, symptoms, and laboratory reports.
Order imaging relevant to treatment decisions
Assigned to discuss the value of imaging for assessing progression, Xenofon Baraliakos, MD, a rheumatologist and clinical researcher at Rheumazentrum Ruhrgebiet, Ruhr-University Bochum, Herne, Germany, offered the same message.
“It is important to consider all of the clinical information available, not just the features on imaging,” Dr. Baraliakos said. Often, MRI findings provide corroboration for other objective measures of disease status, but Dr. Baraliakos advised that imaging should be ordered only when it has the potential to alter therapy.
“What we can learn from imaging might be interesting, but the question to ask is whether it is useful,” Dr. Baraliakos said. Rather than incurring the costs of imaging for reassurance, Dr. Baraliakos recommended ordering these studies with specific objectives relevant to treatment decisions.
Neither Dr. van Gaalen nor Dr. Baraliakos denied the value of imaging, particularly MRI, to increase confidence in the diagnosis of axSpA or to guide therapy. Rather, their point was that imaging should not be considered a reliable stand-alone axSpA assessment strategy.
Clinical and imaging findings better then imaging alone
Data from a blinded radiology study presented during the same scientific session reinforced this conclusion. Led by Dr. Baraliakos and presented separately from his discussion about the adjunctive nature of imaging data in axSpA, the study showed that rheumatologists with access to both clinical and imaging data can detect a greater proportion of axSpA than radiologists working from imaging data alone.
In this study, 300 consecutive patients suspected of axSpA were enrolled. All had chronic back pain of more than 3 months’ duration. While highly experienced radiologists were asked to diagnose or rule out a diagnosis of axSpA on the basis of the MRI blinded to other clinical information, experienced rheumatologists evaluated the patients with access to all clinical, laboratory, and imaging data.
A diagnosis of axSpA was reached in 131 patients by the rheumatologists. The remaining 169 were determined not to have axSpA. Although the radiologists agreed on those with or without axSpA in 86.3% of cases, there were 31 cases (28.1%) in which rheumatologists diagnosed axSpA but radiologists did not.
In an analysis of which MRI features were considered critical by radiologists when there was agreement, they identified bone marrow edema in seven cases (7.2%). In 30 cases (30.9%), the radiologists considered the presence of chronic lesions to be critical to their diagnosis. In the remaining 69.9% of cases, radiologists were confident in their diagnosis only when both bone edema and chronic lesions were present.
Not surprisingly, the presence of chronic lesions and more pronounced bone marrow edema permitted both radiologists and rheumatologists to increase their confidence when discriminating between axSpA and non-axSpA patients.
“The combination of structural changes and bone marrow edema as assessed by MRI performed best in the process of diagnosing or ruling out axSpA in this real-life setting at our center,” Dr. Baraliakos said.
However, when only one or two features are considered, trade-offs of lower sensitivity for higher specificity or higher sensitivity for lower specificity occur. For example, although the specificity for a diagnosis of axSpA reached 99.4% when both bone marrow edema and ankylosis are present, the sensitivity of this finding was only 5.3%, according to data provided by Dr. Baraliakos. Conversely, the presence of sclerosis had a sensitivity of 81.7% but a specificity of only 43.2%.
One lesson from this analysis is that there is “increasing insecurity of only including bone marrow edema of the sacroiliac joint as the major criterion for diagnosing axSpA,” Dr. Baraliakos said. However, the larger point in the context of the earlier expert comments is that MRI findings should be considered important but insufficient for the evaluation of axSpA.
SOURCE: Baraliakos X et al. Ann Rheum Dis. Jun 2019;78(Suppl 2):255-6. Abstract OPO344, doi: 10.1136/annrheumdis-2019-eular.5027
MADRID – Evidence for always using imaging in an adjunctive role to clinical findings in the diagnosis and assessment of axial spondyloarthritis (axSpA) continues to grow, two experts agreed in a scientific session at the European Congress of Rheumatology.
“Imaging has to be understood in the context of other findings. With the patient history, the physical examination, and the laboratory results, the value of imaging improves substantially. Therefore, before an image is ordered it is important to ask how likely is it that a patient has axial spondylitis,” said Floris A. van Gaalen, MD, PhD, of Leiden (Netherlands) University Medical Center.
As one of the experts who participated in the scientific session, Dr. van Gaalen focused specifically on the value of x-ray and MRI in the diagnosis of axSpA, emphasizing their limited value if interpreted without clinical context. He explained that even highly experienced radiologists are fooled, particularly at early stages of disease.
Although the quality of imaging has been increasing steadily, “there is no cookbook approach with which you can guarantee a diagnosis of spondyloarthritis. Imaging can be valuable, but there is a risk of false positives because features on imaging, such as bone marrow edema, are shared with other sources of back pain,” Dr. van Gaalen said.
Considering the importance of context, Dr. van Gaalen advised clinicians against reading the radiology report without evaluating the images themselves. He said the features on imaging make more sense when they are considered at the same time as the patient’s history, symptoms, and laboratory reports.
Order imaging relevant to treatment decisions
Assigned to discuss the value of imaging for assessing progression, Xenofon Baraliakos, MD, a rheumatologist and clinical researcher at Rheumazentrum Ruhrgebiet, Ruhr-University Bochum, Herne, Germany, offered the same message.
“It is important to consider all of the clinical information available, not just the features on imaging,” Dr. Baraliakos said. Often, MRI findings provide corroboration for other objective measures of disease status, but Dr. Baraliakos advised that imaging should be ordered only when it has the potential to alter therapy.
“What we can learn from imaging might be interesting, but the question to ask is whether it is useful,” Dr. Baraliakos said. Rather than incurring the costs of imaging for reassurance, Dr. Baraliakos recommended ordering these studies with specific objectives relevant to treatment decisions.
Neither Dr. van Gaalen nor Dr. Baraliakos denied the value of imaging, particularly MRI, to increase confidence in the diagnosis of axSpA or to guide therapy. Rather, their point was that imaging should not be considered a reliable stand-alone axSpA assessment strategy.
Clinical and imaging findings better then imaging alone
Data from a blinded radiology study presented during the same scientific session reinforced this conclusion. Led by Dr. Baraliakos and presented separately from his discussion about the adjunctive nature of imaging data in axSpA, the study showed that rheumatologists with access to both clinical and imaging data can detect a greater proportion of axSpA than radiologists working from imaging data alone.
In this study, 300 consecutive patients suspected of axSpA were enrolled. All had chronic back pain of more than 3 months’ duration. While highly experienced radiologists were asked to diagnose or rule out a diagnosis of axSpA on the basis of the MRI blinded to other clinical information, experienced rheumatologists evaluated the patients with access to all clinical, laboratory, and imaging data.
A diagnosis of axSpA was reached in 131 patients by the rheumatologists. The remaining 169 were determined not to have axSpA. Although the radiologists agreed on those with or without axSpA in 86.3% of cases, there were 31 cases (28.1%) in which rheumatologists diagnosed axSpA but radiologists did not.
In an analysis of which MRI features were considered critical by radiologists when there was agreement, they identified bone marrow edema in seven cases (7.2%). In 30 cases (30.9%), the radiologists considered the presence of chronic lesions to be critical to their diagnosis. In the remaining 69.9% of cases, radiologists were confident in their diagnosis only when both bone edema and chronic lesions were present.
Not surprisingly, the presence of chronic lesions and more pronounced bone marrow edema permitted both radiologists and rheumatologists to increase their confidence when discriminating between axSpA and non-axSpA patients.
“The combination of structural changes and bone marrow edema as assessed by MRI performed best in the process of diagnosing or ruling out axSpA in this real-life setting at our center,” Dr. Baraliakos said.
However, when only one or two features are considered, trade-offs of lower sensitivity for higher specificity or higher sensitivity for lower specificity occur. For example, although the specificity for a diagnosis of axSpA reached 99.4% when both bone marrow edema and ankylosis are present, the sensitivity of this finding was only 5.3%, according to data provided by Dr. Baraliakos. Conversely, the presence of sclerosis had a sensitivity of 81.7% but a specificity of only 43.2%.
One lesson from this analysis is that there is “increasing insecurity of only including bone marrow edema of the sacroiliac joint as the major criterion for diagnosing axSpA,” Dr. Baraliakos said. However, the larger point in the context of the earlier expert comments is that MRI findings should be considered important but insufficient for the evaluation of axSpA.
SOURCE: Baraliakos X et al. Ann Rheum Dis. Jun 2019;78(Suppl 2):255-6. Abstract OPO344, doi: 10.1136/annrheumdis-2019-eular.5027
MADRID – Evidence for always using imaging in an adjunctive role to clinical findings in the diagnosis and assessment of axial spondyloarthritis (axSpA) continues to grow, two experts agreed in a scientific session at the European Congress of Rheumatology.
“Imaging has to be understood in the context of other findings. With the patient history, the physical examination, and the laboratory results, the value of imaging improves substantially. Therefore, before an image is ordered it is important to ask how likely is it that a patient has axial spondylitis,” said Floris A. van Gaalen, MD, PhD, of Leiden (Netherlands) University Medical Center.
As one of the experts who participated in the scientific session, Dr. van Gaalen focused specifically on the value of x-ray and MRI in the diagnosis of axSpA, emphasizing their limited value if interpreted without clinical context. He explained that even highly experienced radiologists are fooled, particularly at early stages of disease.
Although the quality of imaging has been increasing steadily, “there is no cookbook approach with which you can guarantee a diagnosis of spondyloarthritis. Imaging can be valuable, but there is a risk of false positives because features on imaging, such as bone marrow edema, are shared with other sources of back pain,” Dr. van Gaalen said.
Considering the importance of context, Dr. van Gaalen advised clinicians against reading the radiology report without evaluating the images themselves. He said the features on imaging make more sense when they are considered at the same time as the patient’s history, symptoms, and laboratory reports.
Order imaging relevant to treatment decisions
Assigned to discuss the value of imaging for assessing progression, Xenofon Baraliakos, MD, a rheumatologist and clinical researcher at Rheumazentrum Ruhrgebiet, Ruhr-University Bochum, Herne, Germany, offered the same message.
“It is important to consider all of the clinical information available, not just the features on imaging,” Dr. Baraliakos said. Often, MRI findings provide corroboration for other objective measures of disease status, but Dr. Baraliakos advised that imaging should be ordered only when it has the potential to alter therapy.
“What we can learn from imaging might be interesting, but the question to ask is whether it is useful,” Dr. Baraliakos said. Rather than incurring the costs of imaging for reassurance, Dr. Baraliakos recommended ordering these studies with specific objectives relevant to treatment decisions.
Neither Dr. van Gaalen nor Dr. Baraliakos denied the value of imaging, particularly MRI, to increase confidence in the diagnosis of axSpA or to guide therapy. Rather, their point was that imaging should not be considered a reliable stand-alone axSpA assessment strategy.
Clinical and imaging findings better then imaging alone
Data from a blinded radiology study presented during the same scientific session reinforced this conclusion. Led by Dr. Baraliakos and presented separately from his discussion about the adjunctive nature of imaging data in axSpA, the study showed that rheumatologists with access to both clinical and imaging data can detect a greater proportion of axSpA than radiologists working from imaging data alone.
In this study, 300 consecutive patients suspected of axSpA were enrolled. All had chronic back pain of more than 3 months’ duration. While highly experienced radiologists were asked to diagnose or rule out a diagnosis of axSpA on the basis of the MRI blinded to other clinical information, experienced rheumatologists evaluated the patients with access to all clinical, laboratory, and imaging data.
A diagnosis of axSpA was reached in 131 patients by the rheumatologists. The remaining 169 were determined not to have axSpA. Although the radiologists agreed on those with or without axSpA in 86.3% of cases, there were 31 cases (28.1%) in which rheumatologists diagnosed axSpA but radiologists did not.
In an analysis of which MRI features were considered critical by radiologists when there was agreement, they identified bone marrow edema in seven cases (7.2%). In 30 cases (30.9%), the radiologists considered the presence of chronic lesions to be critical to their diagnosis. In the remaining 69.9% of cases, radiologists were confident in their diagnosis only when both bone edema and chronic lesions were present.
Not surprisingly, the presence of chronic lesions and more pronounced bone marrow edema permitted both radiologists and rheumatologists to increase their confidence when discriminating between axSpA and non-axSpA patients.
“The combination of structural changes and bone marrow edema as assessed by MRI performed best in the process of diagnosing or ruling out axSpA in this real-life setting at our center,” Dr. Baraliakos said.
However, when only one or two features are considered, trade-offs of lower sensitivity for higher specificity or higher sensitivity for lower specificity occur. For example, although the specificity for a diagnosis of axSpA reached 99.4% when both bone marrow edema and ankylosis are present, the sensitivity of this finding was only 5.3%, according to data provided by Dr. Baraliakos. Conversely, the presence of sclerosis had a sensitivity of 81.7% but a specificity of only 43.2%.
One lesson from this analysis is that there is “increasing insecurity of only including bone marrow edema of the sacroiliac joint as the major criterion for diagnosing axSpA,” Dr. Baraliakos said. However, the larger point in the context of the earlier expert comments is that MRI findings should be considered important but insufficient for the evaluation of axSpA.
SOURCE: Baraliakos X et al. Ann Rheum Dis. Jun 2019;78(Suppl 2):255-6. Abstract OPO344, doi: 10.1136/annrheumdis-2019-eular.5027
REPORTING FROM EULAR 2019 CONGRESS