Venous aneurysms are rare entities usually found at physical examination or imaging exams. Their rarity justifies the need for investigation and publication of case reports, the objective of the present report. We report the case of a 30-year old female with history of an asymptomatic enlarging mass in the neck for 10 years. She underwent resection of the mass and left external jugular vein ligation under general anaesthesia. A literature review shows that venous aneurysms can cause thrombophlebitis and pulmonary embolism or undergo spontaneous rupture which can further complicate the situation for both anaesthetist and surgeon. Prophylactic surgical treatment is recommended for low-risk patients with venous aneurysms of the abdomen and strongly recommended for most patients with lower extremity deep venous aneurysms. Other venous aneurysms should be excised only if they are symptomatic, enlarging or disfiguring.