The occurrence of fat-fluid levels in ascites, although rare, is pathognomic of chylous ascites. The ultrasound and CT scan findings of a fat-fluid level in the ascitic fluid of a patient with abdominal tuberculosis are described here. Recognition of this important sign, in conjunction with other ancillary findings of abdominal tuberculosis, assist in establishing the correct diagnosis. Anti-tuberculous chemotherapy suffices in treating the condition, thus obviating the need for surgical intervention.