The present application relates to an internal optical spectroscope comprising: a needle sleeve insertable into and removable from targeted living tissue a shaft housed by the needle sleeve including at least one v-shaped trough including an aft side and a next-to-aft side a light source comprising variable light wave lengths of both visible and near infrared light at least one light transmission fiber comprising a transmitting end at least one light detector fiber comprising a receptive end and data processor. The present application also relates to a method of performing an optical biopsy in situ.
