Laparoscopic Transabdominal Repair for Lumbar Hernia: A Familiar Procedure for a Rare Problem

Lumbar hernia is a protrusion of intraperitoneal or extraperitoneal tissues through posterior abdominal wall defect and is considered to be a rare condition. We present a case of 65-year-old lady with primary spontaneous superior lumbar hernia treated laparoscopically, with the detailed operative steps and post-operative follow-up. With the growing experience in laparoscopic inguinal hernia repair, same technique, instruments and device used in transabdominal preperitoneal (TAPP) repair can be applied to treat selected cases of lumbar hernia with good outcome.


Introduction
Lumbar hernias are considered to be a rare condition and very few cases are encountered in a surgeon's career. Approximately 300 cases have been published since the first reported case by Garangoet in 1731 [1].
Lumbar hernias are located in the Thoracolumbar region. It is a protrusion of intraperitoneal or extraperitoneal tissues through posterior abdominal wall defect. Further classification and description of boundaries was done by Petit (1783) and Grynfelt (1866) into inferior and superior triangles, respectively; apart from the site of their occurrence, there are different classifications of the lumbar hernias. They can be congenital or acquired. Acquired hernias can be spontaneous or secondary, with the latter being the most common etiology [2] [3] [4] [5].
A number of case reports about lumbar hernias could be found in the litera- This report presents a case of primary spontaneous superior lumbar hernia treated laparoscopically, the first case to be published from Saudi Arabia.
The operative steps will be detailed to highlight the feasibility and the relative simplicity of this procedure.

Case Report
A 65 years old female, known case of type II Diabetes Mellitus on oral hypoglycemic medications, hypertension on valsartan and bronchial asthma on salbutamol nebulization when needed, presented with 6 months history of right loin pain.
The pain was dull in nature, increasing progressively with time, continuous, radiating to the pelvis with no aggravating or relieving factors. Patient denied any history of trauma or previous surgeries. She complained of dysuria and decrease in urine output, no Constipation or Change in Bowel habit, she was vitally stable, afebrile upon her presentation.
On examination, a right lumbar region mass measuring 6 * 7 cm was palpated, it was tender on palpation with no overlying erythema or skin changes, not reducible, her abdomen otherwise was soft, non-tender, with positive bowel sounds.    Patient tolerated well the procedure and discharged home on post-operative day 2, she was followed in clinic on day 7 then 14 and the ureteric stent was removed on day 21 under local anesthesia. She was pain free and the lumbar mass was clinically absent on follow up at 1 month and 6 months.

Discussion
Lumbar hernias may be congenital or acquired. Congenital hernias appear during infancy as the origin of a defect in the musculoskeletal system of the lumbar region and are associated with other malformations. Acquired lumbar hernias are usually primary-or spontaneous-and secondary, depending on the existence of a causal factor such as surgery, infection, or trauma. Predisposing factors in spontaneous acquired lumbar hernia are age, obesity, extreme thinness, chronic debilitating disease, muscular atrophy, intense slimming, chronic bronchitis, wound infection, and postoperative sepsis [6].
The most common clinical manifestation is a palpable mass that increases with coughing and strenuous activity, usually reducible and non-tender. Occasionally it can grow to a large size and alter the symmetry of the patient's torso.  [1]. When history and physical exam raise concern for lumbar hernia, CT scan is the preferred modality for confirming the diagnoses as well as delineating the muscular and fascial layers and the contents within the hernia sac [9]. Most of the patients are treated as elective cases, and only 9% present as a surgical emergency. The treatment of choice has always been surgical repair, and once the diagnosis has been made, these patients should be treated to avoid complications.
Many techniques have been described for surgical repair of lumbar hernias, with an incision from the 12 th rib to the iliac crest, including primary repair, local tissue flaps, only fascial flaps, and conventional prosthetic mesh repair [10].
Burick and Parascandola performed the first repair by transabdominal laparoscopic approach in 1996 [11]. Woodward and colleagues introduced the balloon dissector for a total extra-peritoneal approach in 1999 [12].
In our institution we have a wide experience in treating inguinal and ventral hernias both open and laparoscopically. This was the first diagnosed lumbar hernia case in our hospital and the first in most of our surgeons' career. After reviewing the CT scan and using a multidisciplinary discussion with our urology and radiology colleagues, we decided to treat it laparoscopically using the same techniques and basics of a TAPP. After ureteral stent placement and lateral position, the procedure length was 90 minutes, similar to a TAPP procedure no special instruments or device were used, the patient tolerated the procedure and discharged in reasonable time In our case even though the hernia was big (8 cm), but the small size (2 cm) of the defect made its repair easy. The challenge in this technique will be faced with large defects more than 5 cm, with traumatic or incisional hernias and with hernias containing bowel or other structures.
With the evolution of laparoscopy and the growing use of robotics in hernia surgeries, more procedures on more complex cases should be reported, comparative studies with other techniques should be done, evaluating recurrence rate and patient satisfaction.

Conclusions
Lumbar hernias are uncommon to encounter, as they are rare type of hernia. It can be a challenge to diagnose it initially. Few cases can present as emergency case; however the majority of lumbar hernias are treated electively.
With good preoperative assessment and selection, and based on a solid experience in laparoscopic inguinal and ventral hernia repair, same techniques can be used to treat lumbar hernias. The transabdominal preperitoneal TAPP approach is relatively easy to perform with excellent patient tolerability and good short and medium-term outcome.

Conflicts of Interest
The authors declare no conflicts of interest regarding the publication of this paper.