[Problem] to provide an extracted tissue processing device and the like that can efficiently extract an acquisition target component from a tissue piece while suppressing damage to the acquisition target component. [Solution] an extracted tissue treatment apparatus 100 for taking out and acquiring lymph nodes L from a tissue piece H including lymph nodes L to be an acquisition target component includes: A dissolution tank 1 for storing a dissolution treatment liquid D for dissolving components other than the lymph nodes L in the tissue piece H; a stirring body 10 arranged adjacent to the tissue piece H in the dissolution tank 1, And a drive device 3 for reciprocating the agitation body 10. Selected drawing: Figure 1
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