Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) X-linked thrombocytopenia ?
    ### Response:
    X-linked thrombocytopenia is a bleeding disorder that primarily affects males. This condition is characterized by a blood cell abnormality called thrombocytopenia, which is a shortage in the number of cells involved in clotting (platelets). Affected individuals often have abnormally small platelets as well, a condition called microthrombocytopenia.
    