Abstract: A probe for detecting cancerous tissue, the probe including an illuminator, an optical spectrum analyzer, and an indicator for indicating whether cancerous tissue has been detected in reflected spectrum analyzed by the optical spectrum analyzer. A method for detecting cancerous tissue, the method including providing a probe including an optical spectrum analyzer, placing the probe to include tissue-to-be-tested within a Field-Of-View (FOV) of the spectrum analyzer, optically illuminating the tissue-to-be-tested, analyzing light reflected from the tissue-to-be-tested, and determining whether or not cancerous tissue is detected in the FOV. Related apparatus and methods are also described.