Generally, an appeal is regarded as a continuation of the original suit rather than the inception of a new action. Because of this, in an appeal, parties are normally confined to their case as pleaded in the Court of first instance. They are not allowed to make a new and different case on appeal. They are not allowed to raise in such appeal new Issues without the express leave of Court or to proffer new evidence without such leave. An appeal, being a judicial examination by a higher Court of the decision of an inferior Court, it follows that such examination should normally and more appropriately be confined to the facts and issues that came before the inferior Court for decision.
– Oputa, JSC. Adegoke v. Adesanya (1989)