Aim: Method of surgery and efficiency of postoperative therapy following microsurgical excision of the lumbar paravertebral tumor using a lateral retroperitoneal approach. Methods: A retrospective investigation of the case files of patients at Mayo Hospital in Lahore, Pakistan, who had lumbar paravertebral tumors removed using the approach of lateral retroperitoneal was carried out. Information on the length of the operation, the blood amount that was lost, the cut length, the number of days spent in the hospital, the percentage of paravertebral tumor that was removed, patients' ability to do ADLs after surgery, and the occurrence of complications were also gathered. Results: The duration of the operations varied from 50 minutes up to 180 minutes, with an average of (95 ± 50) minutes. An average blood loss was 32.5 ± 37.6 ml (range: 10-90 ml). On average, the length of the incision was (7.5 ± 0.5) centimeters. Patients spent an average of (9.2 ± 2.3) days in the hospital. The range was 6-12 days. The paravertebral tumor had a perfect resection rate. Three individuals were found to have Schwannomas after surgery, while one had a ganglioneuroma and a Malignant tiny round cell tumor. After 3 months (the follow-up period), no change was observed in ADL score compared to pre-operative levels, and no cases of tumor recurrence, infection, or mortality have been recorded. Conclusions: The lateral retroperitoneal approach is a surgical therapy for lumbar paravertebral tumors that offers a number of benefits, such as operation time is very short, not very much invasive treatments, rapid recovery after surgery, and fewer problems than other surgical approaches.