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docs_md/articles/cidp_12e4033c-edc8-46ff-8081-3acc433cda78.md
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### Selected Images
![Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='/img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.](images/app.statdx.com_image_thumbnail_e0d1598d-4a92-4d78-9124-87f27a196230_annotated_true_size_900_quality_90_8ebe0b28_20251018T122453Z.jpg)
*Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='/img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.*
![Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.](images/app.statdx.com_image_thumbnail_e0d1598d-4a92-4d78-9124-87f27a196230_annotated_true_size_900_quality_90_8ebe0b28_20251018T122453Z.jpg)
*Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.*
![Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='/img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.](images/app.statdx.com_image_thumbnail_e0d1598d-4a92-4d78-9124-87f27a196230_size_168_quality_85_41f53f54_20251018T095234Z.jpg)
*Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='/img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.*
![Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.](images/app.statdx.com_image_thumbnail_e0d1598d-4a92-4d78-9124-87f27a196230_size_168_quality_85_41f53f54_20251018T095234Z.jpg)
*Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.*
![Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='/img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.](images/app.statdx.com_image_thumbnail_e0d1598d-4a92-4d78-9124-87f27a196230_size_174_quality_85_90acc783_20251018T122441Z.jpg)
*Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='/img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.*
![Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.](images/app.statdx.com_image_thumbnail_e0d1598d-4a92-4d78-9124-87f27a196230_size_174_quality_85_90acc783_20251018T122441Z.jpg)
*Sagittal T1 C+ MR of the cervical spine shows marked hypertrophy and enhancement of all exiting cervical nerve roots <img src='img/arrows/CS.png'/>. 5 mm is considered an adequate cut-off value of cervical spinal nerve root diameter, discriminating CIDP from controls. Mean diameter of spinal nerve roots in CIDP: Cervical 6-6.8 mm; lumbosacral 7.3-10.4 mm.*
![Sagittal T2WI MR reveals enlargement and T2 hyperintensity of exiting extradural lumbosacral nerves <img src='/img/arrows/CS.png'/>. High signal of CSF should be excluded while measuring nerve root size/area in T2 MR.](images/app.statdx.com_image_thumbnail_c27b3469-6c6e-4d3c-8cc8-a93671c5bf09_annotated_true_size_900_quality_90_ac6a09e4_20251018T122453Z.jpg)
*Sagittal T2WI MR reveals enlargement and T2 hyperintensity of exiting extradural lumbosacral nerves <img src='/img/arrows/CS.png'/>. High signal of CSF should be excluded while measuring nerve root size/area in T2 MR.*
![Sagittal T2WI MR reveals enlargement and T2 hyperintensity of exiting extradural lumbosacral nerves <img src='img/arrows/CS.png'/>. High signal of CSF should be excluded while measuring nerve root size/area in T2 MR.](images/app.statdx.com_image_thumbnail_c27b3469-6c6e-4d3c-8cc8-a93671c5bf09_annotated_true_size_900_quality_90_ac6a09e4_20251018T122453Z.jpg)
*Sagittal T2WI MR reveals enlargement and T2 hyperintensity of exiting extradural lumbosacral nerves <img src='img/arrows/CS.png'/>. High signal of CSF should be excluded while measuring nerve root size/area in T2 MR.*
![Sagittal T2WI MR reveals enlargement and T2 hyperintensity of exiting extradural lumbosacral nerves <img src='/img/arrows/CS.png'/>. High signal of CSF should be excluded while measuring nerve root size/area in T2 MR.](images/app.statdx.com_image_thumbnail_c27b3469-6c6e-4d3c-8cc8-a93671c5bf09_size_168_quality_85_8455ce81_20251018T095234Z.jpg)
*Sagittal T2WI MR reveals enlargement and T2 hyperintensity of exiting extradural lumbosacral nerves <img src='/img/arrows/CS.png'/>. High signal of CSF should be excluded while measuring nerve root size/area in T2 MR.*
![Sagittal T2WI MR reveals enlargement and T2 hyperintensity of exiting extradural lumbosacral nerves <img src='img/arrows/CS.png'/>. High signal of CSF should be excluded while measuring nerve root size/area in T2 MR.](images/app.statdx.com_image_thumbnail_c27b3469-6c6e-4d3c-8cc8-a93671c5bf09_size_168_quality_85_8455ce81_20251018T095234Z.jpg)
*Sagittal T2WI MR reveals enlargement and T2 hyperintensity of exiting extradural lumbosacral nerves <img src='img/arrows/CS.png'/>. High signal of CSF should be excluded while measuring nerve root size/area in T2 MR.*
![Axial T1WI C+ MR depicts enlargement and abnormal enhancement of exiting extradural lumbosacral nerves <img src='/img/arrows/CS.png'/>. Blood-nerve barrier breakdown can cause contrast enhancement. Axon loss associated with demyelination is the most important factor of disability and resistance to treatment. Root hypertrophy also may cause stenosis symptoms.](images/app.statdx.com_image_thumbnail_f40f3c68-4a6c-4e61-a1d0-818ea614c071_annotated_true_size_900_quality_90_d99899db_20251018T122453Z.jpg)
*Axial T1WI C+ MR depicts enlargement and abnormal enhancement of exiting extradural lumbosacral nerves <img src='/img/arrows/CS.png'/>. Blood-nerve barrier breakdown can cause contrast enhancement. Axon loss associated with demyelination is the most important factor of disability and resistance to treatment. Root hypertrophy also may cause stenosis symptoms.*
![Axial T1WI C+ MR depicts enlargement and abnormal enhancement of exiting extradural lumbosacral nerves <img src='img/arrows/CS.png'/>. Blood-nerve barrier breakdown can cause contrast enhancement. Axon loss associated with demyelination is the most important factor of disability and resistance to treatment. Root hypertrophy also may cause stenosis symptoms.](images/app.statdx.com_image_thumbnail_f40f3c68-4a6c-4e61-a1d0-818ea614c071_annotated_true_size_900_quality_90_d99899db_20251018T122453Z.jpg)
*Axial T1WI C+ MR depicts enlargement and abnormal enhancement of exiting extradural lumbosacral nerves <img src='img/arrows/CS.png'/>. Blood-nerve barrier breakdown can cause contrast enhancement. Axon loss associated with demyelination is the most important factor of disability and resistance to treatment. Root hypertrophy also may cause stenosis symptoms.*
![Axial T1WI C+ MR depicts enlargement and abnormal enhancement of exiting extradural lumbosacral nerves <img src='/img/arrows/CS.png'/>. Blood-nerve barrier breakdown can cause contrast enhancement. Axon loss associated with demyelination is the most important factor of disability and resistance to treatment. Root hypertrophy also may cause stenosis symptoms.](images/app.statdx.com_image_thumbnail_f40f3c68-4a6c-4e61-a1d0-818ea614c071_size_168_quality_85_b4a51382_20251018T095234Z.jpg)
*Axial T1WI C+ MR depicts enlargement and abnormal enhancement of exiting extradural lumbosacral nerves <img src='/img/arrows/CS.png'/>. Blood-nerve barrier breakdown can cause contrast enhancement. Axon loss associated with demyelination is the most important factor of disability and resistance to treatment. Root hypertrophy also may cause stenosis symptoms.*
![Axial T1WI C+ MR depicts enlargement and abnormal enhancement of exiting extradural lumbosacral nerves <img src='img/arrows/CS.png'/>. Blood-nerve barrier breakdown can cause contrast enhancement. Axon loss associated with demyelination is the most important factor of disability and resistance to treatment. Root hypertrophy also may cause stenosis symptoms.](images/app.statdx.com_image_thumbnail_f40f3c68-4a6c-4e61-a1d0-818ea614c071_size_168_quality_85_b4a51382_20251018T095234Z.jpg)
*Axial T1WI C+ MR depicts enlargement and abnormal enhancement of exiting extradural lumbosacral nerves <img src='img/arrows/CS.png'/>. Blood-nerve barrier breakdown can cause contrast enhancement. Axon loss associated with demyelination is the most important factor of disability and resistance to treatment. Root hypertrophy also may cause stenosis symptoms.*
![Sagittal FLAIR MR demonstrates periventricular ovoid hyperintensities <img src='/img/arrows/CO.png'/> in a typical case of marked fusiform CIDP nerve enlargement with brain demyelination.](images/app.statdx.com_image_thumbnail_8ef8ec72-8984-4f90-8380-953114da6604_annotated_true_size_900_quality_90_c59fe9eb_20251018T122453Z.jpg)
*Sagittal FLAIR MR demonstrates periventricular ovoid hyperintensities <img src='/img/arrows/CO.png'/> in a typical case of marked fusiform CIDP nerve enlargement with brain demyelination.*
![Sagittal FLAIR MR demonstrates periventricular ovoid hyperintensities <img src='img/arrows/CO.png'/> in a typical case of marked fusiform CIDP nerve enlargement with brain demyelination.](images/app.statdx.com_image_thumbnail_8ef8ec72-8984-4f90-8380-953114da6604_annotated_true_size_900_quality_90_c59fe9eb_20251018T122453Z.jpg)
*Sagittal FLAIR MR demonstrates periventricular ovoid hyperintensities <img src='img/arrows/CO.png'/> in a typical case of marked fusiform CIDP nerve enlargement with brain demyelination.*
![Sagittal FLAIR MR demonstrates periventricular ovoid hyperintensities <img src='/img/arrows/CO.png'/> in a typical case of marked fusiform CIDP nerve enlargement with brain demyelination.](images/app.statdx.com_image_thumbnail_8ef8ec72-8984-4f90-8380-953114da6604_size_168_quality_85_e847b484_20251018T095234Z.jpg)
*Sagittal FLAIR MR demonstrates periventricular ovoid hyperintensities <img src='/img/arrows/CO.png'/> in a typical case of marked fusiform CIDP nerve enlargement with brain demyelination.*
![Sagittal FLAIR MR demonstrates periventricular ovoid hyperintensities <img src='img/arrows/CO.png'/> in a typical case of marked fusiform CIDP nerve enlargement with brain demyelination.](images/app.statdx.com_image_thumbnail_8ef8ec72-8984-4f90-8380-953114da6604_size_168_quality_85_e847b484_20251018T095234Z.jpg)
*Sagittal FLAIR MR demonstrates periventricular ovoid hyperintensities <img src='img/arrows/CO.png'/> in a typical case of marked fusiform CIDP nerve enlargement with brain demyelination.*
### Additional Images
![Axial T1WI C+ MR shows thickening and enhancement of ventral and dorsal cauda equina nerve roots <img src='/img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_385d96c2-5ef1-466a-bbf7-bcfbf8fb9433_annotated_true_size_900_quality_90_b76815ce_20251018T122453Z.jpg)
*Axial T1WI C+ MR shows thickening and enhancement of ventral and dorsal cauda equina nerve roots <img src='/img/arrows/WS.png'/>.*
![Axial T1WI C+ MR shows thickening and enhancement of ventral and dorsal cauda equina nerve roots <img src='img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_385d96c2-5ef1-466a-bbf7-bcfbf8fb9433_annotated_true_size_900_quality_90_b76815ce_20251018T122453Z.jpg)
*Axial T1WI C+ MR shows thickening and enhancement of ventral and dorsal cauda equina nerve roots <img src='img/arrows/WS.png'/>.*
![Axial T1WI C+ MR shows thickening and enhancement of ventral and dorsal cauda equina nerve roots <img src='/img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_385d96c2-5ef1-466a-bbf7-bcfbf8fb9433_size_168_quality_85_3828ef00_20251018T095234Z.jpg)
*Axial T1WI C+ MR shows thickening and enhancement of ventral and dorsal cauda equina nerve roots <img src='/img/arrows/WS.png'/>.*
![Axial T1WI C+ MR shows thickening and enhancement of ventral and dorsal cauda equina nerve roots <img src='img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_385d96c2-5ef1-466a-bbf7-bcfbf8fb9433_size_168_quality_85_3828ef00_20251018T095234Z.jpg)
*Axial T1WI C+ MR shows thickening and enhancement of ventral and dorsal cauda equina nerve roots <img src='img/arrows/WS.png'/>.*
![Sagittal T2WI MR demonstrates diffuse thickening of the intradural cauda equina nerve roots.](images/app.statdx.com_image_thumbnail_e85adcc5-c5d2-4c04-b676-83773765bd8e_annotated_true_size_900_quality_90_6f96bf2d_20251018T122453Z.jpg)
*Sagittal T2WI MR demonstrates diffuse thickening of the intradural cauda equina nerve roots.*
@@ -369,27 +369,27 @@ breadcrumbs:
![Sagittal T2WI MR demonstrates diffuse thickening of the intradural cauda equina nerve roots.](images/app.statdx.com_image_thumbnail_e85adcc5-c5d2-4c04-b676-83773765bd8e_size_168_quality_85_0a98e931_20251018T095234Z.jpg)
*Sagittal T2WI MR demonstrates diffuse thickening of the intradural cauda equina nerve roots.*
![Sagittal FLAIR MR of the brain in a CIDP patient shows a typical paraventricular demyelinating lesion <img src='/img/arrows/WS.png'/> similar to those seen in multiple sclerosis patients.](images/app.statdx.com_image_thumbnail_4161f150-8dc2-4c83-94b9-4ee9d01c70f7_annotated_true_size_900_quality_90_b058499e_20251018T122453Z.jpg)
*Sagittal FLAIR MR of the brain in a CIDP patient shows a typical paraventricular demyelinating lesion <img src='/img/arrows/WS.png'/> similar to those seen in multiple sclerosis patients.*
![Sagittal FLAIR MR of the brain in a CIDP patient shows a typical paraventricular demyelinating lesion <img src='img/arrows/WS.png'/> similar to those seen in multiple sclerosis patients.](images/app.statdx.com_image_thumbnail_4161f150-8dc2-4c83-94b9-4ee9d01c70f7_annotated_true_size_900_quality_90_b058499e_20251018T122453Z.jpg)
*Sagittal FLAIR MR of the brain in a CIDP patient shows a typical paraventricular demyelinating lesion <img src='img/arrows/WS.png'/> similar to those seen in multiple sclerosis patients.*
![Sagittal FLAIR MR of the brain in a CIDP patient shows a typical paraventricular demyelinating lesion <img src='/img/arrows/WS.png'/> similar to those seen in multiple sclerosis patients.](images/app.statdx.com_image_thumbnail_4161f150-8dc2-4c83-94b9-4ee9d01c70f7_size_168_quality_85_efb486ac_20251018T095234Z.jpg)
*Sagittal FLAIR MR of the brain in a CIDP patient shows a typical paraventricular demyelinating lesion <img src='/img/arrows/WS.png'/> similar to those seen in multiple sclerosis patients.*
![Sagittal FLAIR MR of the brain in a CIDP patient shows a typical paraventricular demyelinating lesion <img src='img/arrows/WS.png'/> similar to those seen in multiple sclerosis patients.](images/app.statdx.com_image_thumbnail_4161f150-8dc2-4c83-94b9-4ee9d01c70f7_size_168_quality_85_efb486ac_20251018T095234Z.jpg)
*Sagittal FLAIR MR of the brain in a CIDP patient shows a typical paraventricular demyelinating lesion <img src='img/arrows/WS.png'/> similar to those seen in multiple sclerosis patients.*
![Sagittal T2WI MR depicts enlarged lumbar nerve roots extending into extraforaminal ventral primary rami <img src='/img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_4683fb7b-747f-4882-8f72-0a9b82b28723_annotated_true_size_900_quality_90_af319ef1_20251018T122453Z.jpg)
*Sagittal T2WI MR depicts enlarged lumbar nerve roots extending into extraforaminal ventral primary rami <img src='/img/arrows/WS.png'/>.*
![Sagittal T2WI MR depicts enlarged lumbar nerve roots extending into extraforaminal ventral primary rami <img src='img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_4683fb7b-747f-4882-8f72-0a9b82b28723_annotated_true_size_900_quality_90_af319ef1_20251018T122453Z.jpg)
*Sagittal T2WI MR depicts enlarged lumbar nerve roots extending into extraforaminal ventral primary rami <img src='img/arrows/WS.png'/>.*
![Sagittal T2WI MR depicts enlarged lumbar nerve roots extending into extraforaminal ventral primary rami <img src='/img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_4683fb7b-747f-4882-8f72-0a9b82b28723_size_168_quality_85_b2a08acd_20251018T095234Z.jpg)
*Sagittal T2WI MR depicts enlarged lumbar nerve roots extending into extraforaminal ventral primary rami <img src='/img/arrows/WS.png'/>.*
![Sagittal T2WI MR depicts enlarged lumbar nerve roots extending into extraforaminal ventral primary rami <img src='img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_4683fb7b-747f-4882-8f72-0a9b82b28723_size_168_quality_85_b2a08acd_20251018T095234Z.jpg)
*Sagittal T2WI MR depicts enlarged lumbar nerve roots extending into extraforaminal ventral primary rami <img src='img/arrows/WS.png'/>.*
![Axial T2WI MR shows diffuse thickening and hyperintensity of thoracic nerve roots and paraspinal intercostal nerves.](images/app.statdx.com_image_thumbnail_7443f593-4ded-4c77-b1e2-b2d61ecea64a_size_168_quality_85_52da947b_20251018T095234Z.jpg)
*Axial T2WI MR shows diffuse thickening and hyperintensity of thoracic nerve roots and paraspinal intercostal nerves.*
![Axial T2WI MR reveals bilateral symmetric enlargement, hyperintensity of cervical nerve roots and brachial plexus <img src='/img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_d53c481c-3aa4-4771-8aa3-b7081202b269_size_168_quality_85_93e086b6_20251018T095234Z.jpg)
*Axial T2WI MR reveals bilateral symmetric enlargement, hyperintensity of cervical nerve roots and brachial plexus <img src='/img/arrows/WS.png'/>.*
![Axial T2WI MR reveals bilateral symmetric enlargement, hyperintensity of cervical nerve roots and brachial plexus <img src='img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_d53c481c-3aa4-4771-8aa3-b7081202b269_size_168_quality_85_93e086b6_20251018T095234Z.jpg)
*Axial T2WI MR reveals bilateral symmetric enlargement, hyperintensity of cervical nerve roots and brachial plexus <img src='img/arrows/WS.png'/>.*
![Sagittal T1WI C+ MR demonstrates diffuse pial thickening and enhancement extending into the cauda equina nerve roots. Clinical course distinguished from Guillain-Barr&eacute; (AIDP).](images/app.statdx.com_image_thumbnail_f2bfe031-78d4-4f16-baa0-c95a54f6e565_size_168_quality_85_0fab86e2_20251018T095234Z.jpg)
*Sagittal T1WI C+ MR demonstrates diffuse pial thickening and enhancement extending into the cauda equina nerve roots. Clinical course distinguished from Guillain-Barr&eacute; (AIDP).*
![Axial T2WI MR shows marked enlargement of the lumbar/sacral nerve roots <img src='/img/arrows/BS.png'/> and lumbosacral trunk <img src='/img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_7776240a-5af6-404a-bc66-83b9ee89150e_size_168_quality_85_e3313250_20251018T095234Z.jpg)
*Axial T2WI MR shows marked enlargement of the lumbar/sacral nerve roots <img src='/img/arrows/BS.png'/> and lumbosacral trunk <img src='/img/arrows/WS.png'/>.*
![Axial T2WI MR shows marked enlargement of the lumbar/sacral nerve roots <img src='img/arrows/BS.png'/> and lumbosacral trunk <img src='img/arrows/WS.png'/>.](images/app.statdx.com_image_thumbnail_7776240a-5af6-404a-bc66-83b9ee89150e_size_168_quality_85_e3313250_20251018T095234Z.jpg)
*Axial T2WI MR shows marked enlargement of the lumbar/sacral nerve roots <img src='img/arrows/BS.png'/> and lumbosacral trunk <img src='img/arrows/WS.png'/>.*