Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Catamenial pneumothorax ?
    ### Response:
    What causes catamenial pneumothorax? The exact cause is not known. However, spontaneous collapse of the lung (pneumothorax) occurs in 72% to 73% of cases of thoracic endometriosis. Thoracic endometriosis is a condition in which endometrial tissue is present in the chest (thoracic) cavity.
    