Correction to: Neuro-radiological characteristics of adult diffuse grade II and III insular gliomas classified according to WHO 2016.

In the initial, online publication, the authors' given names were captured as family names and vice versa. The names are correctly shown here. The original article has been corrected.

Neuro-radiological characteristics of adult diffuse grade II and III insular gliomas classified according to WHO 2016.

INTRODUCTION: The phenotypic heterogeneity of diffuse gliomas is still inconsistently explained by known molecular abnormalities. Here, we report the molecular and radiological features of diffuse grade WHO II and III gliomas involving the insula and its potential impact on prognosis. METHODS: Clinical, pathological, molecular and neuro-radiological features of 43 consecutive patients who underwent a surgical resection between 2006 and 2013 for a grade II and III gliomas involving the insula was retrospectively analyzed. RESULTS: Median age was 44.4 years. Eight patients had oligodendrogliomas, IDH mutant (IDHmut) and 1p/19q-codeleted (6 grade II, 2 grade III). Twenty-eight patients had diffuse astrocytomas, IDHmut (22 grade II and 6 grade III) and seven patients had grade II diffuse astrocytomas, IDHwt (A-IDHwt). Vimentin staining was exclusively recorded in tumor cells from A-IDHwt (p = 0.001). Mean cerebral blood volume (CBV) (p = 0.018), maximal value of CBV (p = 0.017) and ratio of the corrected CBV (p = 0.022) were lower for A-IDHwt. Volumetric segmentation of ADC allowed the identification of the tumor cores, which were smaller in A-IDHwt (p < 0.001). The tumor occurrences of A-IDHwt were exclusively located into the temporo-insular region. Median progression-free survival (PFS) and overall survival (OS) were 50.9 months (95% CI: 26.7-75.0) and 80.9 months (60.1-101.6). By multivariate analysis, A-IDHwt (p = 0.009; p = 0.019), 7p gain and 10q loss (p = 0.009; p = 0.016) and vimentin positive staining (p = 0.011; p = 0.029) were associated with poor PFS and OS respectively. CONCLUSIONS: Insular low-grade A-IDHwt presented with poor prognosis despite a smaller tumor core and no evidence of increased perfusion on MR imaging.

Spontaneous atlantoaxial pyogenic arthritis surgically managed.

PURPOSE: Septic cervical facet joints arthritis is a rare pathology, usually revealed by fever and neck pain. As symptoms may be indolent, a high index of suspicion needs to be maintained. Magnetic resonance imaging (MRI) is effective for early diagnostic, looking for local spread and guiding potential preoperative planning. We present a case exhibiting an uncommon pathology with possible significant morbidity if misdiagnosed. METHODS: A 75-year-old woman presented with fever, neck stiffness and torticollis accompanied with altered level of consciousness. RESULTS: The diagnosis was established by computed tomography and MRI, identifying atlantoaxial facet joint destruction with para spinal muscles and epidural abscesses. A surgical treatment consisting in posterior decompression of the spinal canal and atlantoaxial pars articularis fixation known as Harms technique, associated with a targeted antibiotic therapy, succeeded in obtaining favorable clinical course. CONCLUSION: Atlantoaxial septic arthritis is an under reported and severe infection. Early use of MRI should avoid delayed diagnosis and would guide the practitioner in choosing an appropriate therapy. Early surgical treatment for uncontrolled sepsis is also a critical element of the prognosis.