The home side got off to a flying start and were ahead in the fifth minute thanks to an Alberto Cerri shot across the keeper from a slight angle.
The 26-year-old was born in Parma and began his professional career with the club, so his celebration was mild out of respect.
Como almost doubled their lead when Luca Vignali’s mishit cross almost embarassed Gianluigi Buffon, but instead struck the post.
Vignali went close again when a ball was headed down to him in the box, his first time shot was goal bound and required an excellent save from Parma’s veteran keeper.
Como sealed the win when Tommaso Arrigoni, who was subbed on for Cesc Fabregas in the first half, curled a 53rd-minute freekick around the wall and into the bottom-left corner.
Things went from bad to worse for the visitors as Alessandro Circati was shown a red card for obstructing his opponent.
Both sides will be hoping to get into the top eight with the same number of games remaining.
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