Luryi AL, et al. - Researchers performed a comparison of disease, treatment, and outcome characteristics between patients with benign paroxysmal positional vertigo (BPPV) of non-posterior semicircular canals (NP-BPPV) and BPPV involving the posterior canal only (P-BPPV) using the particle repositioning chair as a diagnostic and therapeutic tool. In this work, the particle repositioning chair provided a reliable diagnosis on comparing NP-BPPV and P-BPPV. NP-BPPV affected 19% of patients with BPPV. These patients showed more tendency to have bilateral BPPV and to require more treatment visits but have similar outcomes to those with P-BPPV. They observed a common occurrence of NP-BPPV and thus recommended considering it as part of the differential diagnosis for patients presenting with positional vertigo.