The most common aberration in the hepatic arterial tree is an aberrant right hepatic artery. A careful examination of contrast enhanced CT scan is essential prior to major hepato-pancreatobiliary surgery, to grasp vascular anatomy, locate anomalous vessels, and understand their relevance to avoid unintended adverse effects. Vascular anomaly may also determine surgery strategy, as in this case, the SMA first approach. Careful preoperative contrast enhanced CT scan examination and meticulous surgical technique, increases the possibility of preserving an aberrant hepatic artery and avoiding morbidity post operatively.
Although the intraparotid anatomy of the facial nerve has been very well documented, the surgical approaches to the peripheral, extraparotid branches of the facial nerve have not been described as accurately. The direction followed by the facial nerve branches beyond their emergence from the ventral, cephalic and caudal borders of the parotid gland up to the facial muscles has been studied by several anatomists, but so far, no consistent description of them has been given [16].
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