Congenital Lumbar Hernia in an 8-Month-Old Boy.

Congenital lumbar hernias are uncommonly seen in the pediatric age group, with only about 60 cases reported in the literature. It is usually accompanied by a multitude of congenital anomalies involving different organ systems of the body. For instance, it may involve the ribs, spine, muscles, and the kidneys. Herein, we report a case of congenital lumbar hernia in an 8-month-old boy who underwent an operative repair using a mesh with an uneventful outcome.

Introduction

Congenital lumbar hernias are uncommonly seen in infants and children, with only about 60 cases reported in the English literature [1]. Around two-thirds of the cases have other congenital anomalies, where the lumbocostovertebral syndrome is the most common association. Other associated anomalies include caudal regression syndrome, ureteropelvic junction obstruction, and renal agenesis [2]. Herein, we report a case of congenital lumbar hernia involving the superior lumbar triangle in an 8-month-old boy who underwent an operative repair with an uneventful postoperative course.

Case Report/Case Presentation

An 8-month-old boy presented to our department with a gradually enlarging mass in the left lumbar region since birth. His parents reported that this mass increases with crying and coughing and disappears during sleeping. On examination, a large lumbar swelling on the left side, measuring around 10 × 7 cm, was evident. Reduction of this mass unmasked a huge fascial defect involving the whole layers (shown in Fig. 1). The rest of the examination was unremarkable. Therefore, the diagnosis of congenital lumbar hernia was confirmed. Plain X-ray images for thoracic cage and spine to exclude lumbocostovertebral syndrome and abdominal ultrasound to exclude renal anomalies were performed.

Fig. 1

Clinical examination of the patient. a A well-defined soft tissue mass in the left lumbar region. b Reduction of the mass revealed a huge defect involving all layers.

A left transverse lumbar incision along the skin crease with opening of skin and superficial fascia was performed. Exploration revealed a huge lumbar defect occupying the whole layers, around 12 × 8 cm in dimensions, extending from the costal margin superiorly to the iliac crest inferiorly and the posterior border of the external oblique anteriorly to the quadratus lumborum muscle posteriorly. Closure of the fascial defect by interrupted figure-of-8 tension stitches using vicryl 3/0 was done followed by muscle closure using interrupted simple stitches between the anterior abdominal wall aponeurosis and the quadratus lumborum. As the defect is large, an on-lay mesh repair using Ultrapro mesh, a partially absorbable lightweight mesh, was done and fixed all around by vicryl 3/0 sutures (shown in Fig. 2). The postoperative course was uneventful.

Fig. 2

Intraoperative photos. a, b A fascial defect between the posterior border of the external oblique anteriorly (×) and quadratus lumborum (+) posteriorly. c Plication of the fascial defect. d On-lay mesh repair using Ultrapro mesh.

Discussion/Conclusion

The lumbar region is an exceedingly rare site of herniation in infants and children. This region is divided into 2 triangles: superior and inferior. The superior triangle is bounded by the inferior aspect of the last rib, the internal oblique and the quadratus lumborum, while the inferior one is bounded by the origin of the external oblique, latissimus dorsi, and the iliac crest [3]. In our case, herniation was present in the superior triangle, which is the most common site of lumbar herniation.

Touloukian [4] proposed that a somatic mutation during early embryogenesis, possibly resulting from transient anoxia, is the most probable cause. Consequently, derangement of the lumbar muscles and aponeuroses occur, leading to herniation. This explains the high incidence of associated musculoskeletal abnormalities involving the vertebral bodies, ribs, and trunk musculature [4]. In a review conducted by Rattan et al. [5], all of the cases presented with lumbocostovertebral syndrome along with other associated anomalies. Because of these associations, it is mandatory to rule them out by radiographs of the chest and lumbar spine as well as renal tract ultrasound [6].

Optimal surgical intervention is early operative repair to prevent incarceration [7]. Primary closure of the defect is preferred; however, this may not always applicable. On the other hand, large defects like our case require prosthetic mesh repair [8]. Laparoscopic repair with free fascia lata graft reinforcement is reported as well [9]. Fortunately, these large defects are relatively uncommon, and in a study by Wakhlu and Wakhlu [10], only 3 out of 9 patients required mesh repair.

Statement of Ethics

The Institutional Review Board of Alexandria University approved this case study. Written informed consent for publication including images was obtained from the patient's parents. Research was conducted ethically in accordance with the World Medical Association Declaration of Helsinki.

Conflict of Interest Statement

The authors declare no financial disclosures or conflicts of interest.

Funding Sources

There were no funding sources.

Author Contributions

M. Mansy and M. Abouheba made and confirmed the diagnosis, provided the details of the case, and contributed to the design of the report. M. Kotb drafted the manuscript. All authors read and approved the final version of the manuscript.