Symptom Producing Anomalies of the Sigmoid Sinus: Report of Two Cases

Abstract

Two cases of anomaly of the sigmoid sinus, both superficial and with hernia-like bulging are reported. In the first case, this appeared to be an ctiological factor in facial nerve palsy, of which the true etiology was recognized only at the time of intervention. In the second, vertigo and hearing loss were the main clinical features and, similarly, the role of the sinus anomaly was recognized only by the improvement resulting from its decompression. As far as we are aware this is the first description of an anomaly of the sigmoid sinus causing facial nerve palsy.