Primary lymphoma of breast is an uncommon tumour that constitutes 0.04% to 0.5% of malignant breast neoplasms [1]. Here, we present an interesting case of a 28 years old lady who presented with ascites alongwith past history of lumpectomy breast. Her ascitic fluid cytology showed monomorphic malignant tumour cells of poorly preserved morphology. Being suspicious of tumour type, we reviewed the clinical details and past histopathology records of the patient.