In this group of patients, the presence of RP was not associated with NVC+ (X2 4.05; p = 0.44) As expected, high levels of CPK and positivity for IIM-specific antibodies were closely associated with IIMs (both p ≤ 0.0001), while NVC+, the presence of BCs, high levels of LDH and the presence of PMR symptoms did not show any significant results. Here, PIK3C2A is linked to retinitis pigmentosa 1.