Wisdom Devoid of Compassion

Some schools of Buddhism focus on the cultivation of wisdom/understanding as a way to reduce suffering in this lifetime and to move towards Nirvana. Other schools of Buddhism focus on cultivation of compassion as a means towards these same ends. I've occasionally heard and read statements to the effect that developing wisdom without compassion can be risky, dangerous, cold, cruel, etc. My question is, can true wisdom ever be devoid of compassion? Or would true wisdom by it's nature necessarily contain compassion? In other words, is the risk of developing a cold, cruel wisdom a real possibility?