Correction to: Disc inflammation and Modic changes show an interaction effect on recovery after surgery for lumbar disc herniation.

In Tables 3 and 4: In the first column and row, the text reads "Mixed model test (patients with Modic changes)". This should have been just "Mixed model". The complete correct Tables 3 and 4 are given below.

Lumbar disc extrusions reduce faster than bulging discs due to an active role of macrophages in sciatica.

Objective: This retrospective observational histological study aims to associate the size and type of disc herniation with the degree of macrophage infiltration in disc material retrieved during disc surgery in patients with sciatica.

Methods: Disc tissue of 119 sciatica patients was embedded in paraffin and stained with hematoxylin and CD68. Tissue samples were categorized as mild (0-10/cm), moderate (10-100/cm), and considerable (> 100/cm) macrophage infiltration.

Disc inflammation and Modic changes show an interaction effect on recovery after surgery for lumbar disc herniation.

Purpose: To study the interaction between Modic changes (MC) and inflammation by macrophages in the disc, in relation to clinical symptoms before and after discectomy for lumbar disc herniation.

Methods: Disc tissue was embedded in paraffin and stained with haematoxylin and CD68. Subsequently, tissue samples were categorized for degree of inflammation.

Gadolinium Enhancement Is Not Associated With Disc Inflammation in Patients With Sciatica.

Study Design: Retrospective observational histological study.

Objective: To evaluate the reliability of gadolinium enhancement as a marker for inflammation by associating gadolinium enhancement findings with the degree of inflammation as measured by macrophage infiltration in disc material retrieved during disc surgery in patients with sciatica.

Summary Of Background Data: Disc inflammation often occurs in sciatica patients, a noninvasive tool that is used to assess disc inflammation is Gadolinium enhanced MR imaging.

Impact of single phase CT angiography collateral status on functional outcome over time: results from the MR CLEAN Registry.

Background: Collateral status modified the effect of endovascular treatment (EVT) for stroke in several randomized trials. We assessed the association between collaterals and functional outcome in EVT treated patients and investigated if this association is time dependent.

Methods: We included consecutive patients from the Multicenter Randomized Clinical Trial of Endovascular Treatment for Acute Ischemic Stroke in The Netherlands (MR CLEAN) Registry (March 2014-June 2016) with an anterior circulation large vessel occlusion undergoing EVT.