MUC16 and Pleural effusion: Demons‐Meigs' syndrome includes benign genital tumors other than fibromas or fibromas‐like [5, 7]; pseudo‐Meigs' includes benign and malignant tumors, including metastasis, in the caudal abdomen outside of the genital tract [5, 8, 9]; pseudo‐pseudo Meigs' syndrome, also known as Tjalma syndrome, is described in a patient with systemic lupus erythematosus, ascites, pleural effusion, and raised carbohydrate antigen 125 (also known as cancer antigen 125, CA‐125) [10].