Introduction: Basilar artery provide oxygenated blood to the brain. The vertebral basilar system, which supplies blood to the posterior region of the Willis circle and joins with blood provided to the anterior half of the Willis process from the internal carotid arteries, is made up of the two vertebral arteries and the basilar artery. At the medulla oblongata and pons of the abducens nerves, the two vertebral arteries merge to form the basilar artery. The basilar artery's diameter ranges from 1.5 to 6.6 mm. When the midbrain ascends superiorly in the basilar sulcus of the ventral pons and separates into the posterior cerebral arteries, the midbrain and pons come together. Present complaint and investigation: A-53-year-old female was hospitalized in rural hospital Wardha with complaints of breathing difficulty, lower limb swelling, nausea, and vomiting and chest pain, mucus in the throat and lungs, and loss of appetite since 12 days. Investigation: Haemoglobin is decreased by 10.7gm, WBC count 11,000 per microliter, Total R.B.C. count increased by 5.84 million /cell, M.C.H. level Decreased 70fl, MCH is decreased by 22.8 Pico-gm. Therefore CT report should be interpreted in correlation with clinical & pathological findings. Past History: He had been admitted eight days before outside the hospital for the same complaints. The patient had complaints of Intraventricular Haemorrhage on treatment after investigations and the physical examination diagnosed basilar artery aneurysm with cancer. Conclusion: The prognosis of disease severity can be fair by timely treatment and management of cancer and basilar artery aneurysm.