The present invention relates to an endo photoacoustic tomographic probe for detecting lymph node metastasis of gastro-intestinal tract cancer and an endo photoacoustic tomographic system for detecting lymph node metastasis of gastro-intestinal tract cancer. An endo photoacoustic tomographic probe for detecting lymph node metastasis of gastro-intestinal tract cancer according to one embodiment of the present invention includes a probe body; an optical fiber; a prism; and an ultrasound wave transducer.
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