Causes Pleural effusions Peritoneal effusions Pericardial  Total  cases Percentage  (%) Tuberculosis 9 3 - 12 46.15 Pyogenic 6 3 - 9 34.6 CHF 1 - 1 2 7.69 Pneumonitis 1 - - 1 3.84 Unknown 1 1 - 2 7.69 Total 18 7 1 26 100

Table 1: Aetiology of effusions in control group (clinical diagnosis).