Jitaroon K, et al. - In this case-control study involving 91 patients with olfactory loss and 100 control patients without olfactory loss, researchers assessed the incidence of other cranial nerve deficits in patients with postviral olfactory loss and ascertained whether there is a correlation with neurologic injury in this group. In addition, they explored whether other known risk factors were related to postviral olfactory loss. Compared with 2% within the control group, the incidence of other cranial neuropathies in the postviral olfactory loss group was 11%. Family history of neurologic disease was related to more than 2-fold greater odds of cranial nerve deficit. Postviral olfactory loss seems to be linked to a higher incidence of other cranial neuropathies. In patients who experience this disease process, it is possible that there is an inherent vulnerability to nerve damage or reduced nerve recovery ability.