An apparatus for optical analysis of an associated tissue, the apparatus comprising: - a spectrometer for obtaining measured data representative of an optical spectrum of the associated tissue, wherein the optical spectrum is a Diffuse Reflectance Spectrum, the spectrometer comprising - a light source, - an optical detector, an interventional device suitable for insertion into the associated tissue, the interventional device comprising - one or more guides (217, 219) for - guiding photons from the light source to an exit position on a distal end of the interventional device, the photons being emittable from the exit position, and for - guiding photons from an entry position on the distal end of the interventional device and to the optical detector, so as to enable obtaining the measured data representative of the optical spectrum of the associated tissue at a position of the distal end of the interventional device, and - a processor arranged for - receiving the measured data, - based on a lycopene specific absorption profile, determining from the measured data a first parameter being indicative of a concentration of lycopene in said associated tissue, wherein the processor is further arranged for determining from the first parameter a second parameter being indicative of a tissue type. - a spectrometer for obtaining measured data representative of an optical spectrum of the associated tissue, wherein the optical spectrum is a Diffuse Reflectance Spectrum, the spectrometer comprising - a light source, - an optical detector, an interventional device suitable for insertion into the associated tissue, the interventional device comprising - one or more guides (217, 219) for - guiding photons from the light source to an exit position on a distal end of the interventional device, the photons being emittable from the exit position, and for - guiding photons from an entry position on the distal end of the interventional device and to the optical detector, so as to enable obtaining the measured data representative of the optical spectrum of the associated tissue at a position of the distal end of the interventional device, and - a light source, - an optical detector, - one or more guides (217, 219) for - guiding photons from the light source to an exit position on a distal end of the interventional device, the photons being emittable from the exit position, and for - guiding photons from an entry position on the distal end of the interventional device and to the optical detector, so as to enable obtaining the measured data representative of the optical spectrum of the associated tissue at a position of the distal end of the interventional device, and - guiding photons from the light source to an exit position on a distal end of the interventional device, the photons being emittable from the exit position, and for - guiding photons from an entry position on the distal end of the interventional device and to the optical detector, - a processor arranged for - receiving the measured data, - based on a lycopene specific absorption profile, determining from the measured data a first parameter being indicative of a concentration of lycopene in said associated tissue, wherein the processor is further arranged for determining from the first parameter a second parameter being indicative of a tissue type. - receiving the measured data, - based on a lycopene specific absorption profile, determining from the measured data a first parameter being indicative of a concentration of lycopene in said associated tissue,