Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Chester porphyria ?
    ### Response:
    Chester porphyria is a unique type of porphyria with the signs and symptoms of acute intermittent porphyria (AIP) and the biochemical defects of both AIP and variegate porphyria (VP).  Chester porphyria does not conform to any of the recognized types of acute porphyria.
    