Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) ALG12-congenital disorder of glycosylation ?
    ### Response:
    ALG12-congenital disorder of glycosylation (ALG12-CDG, also known as congenital disorder of glycosylation type Ig) is an inherited disorder with varying signs and symptoms that can affect several body systems. Individuals with ALG12-CDG typically develop signs and symptoms of the condition during infancy.
    