Unilateral pulmonary atresia with total sacral agenesis and other congenital defects

Radiological and clinical aspect of Caudal regression syndrome associated with dorsal hemivertebra without maternal diabetes

Caudal regression syndrome (CRS) is a rare genetic disorder affecting less than 0.1%-0.5% of newborns that manifests as the total or partial absence of lower vertebral structures including the sacral spine. The etiology of CRS remains elusive, but there is compelling evidence supporting a genetic predisposition and a correlation with maternal diabetes. This study presents the case of a 7-year-old girl exhibiting symptoms consistent with CRS including lower limb deficits, abnormal gait, urinary incontinence, and scoliosis. The findings from an MRI scan revealed notable anomalies such as hemivertebra in the dorsal spine, renal deformities, and the absence of secondary neurulation elements in the spine. We chose to delay the hemivertebra surgery because the scoliosis was not highly pronounced. Rather, we directed the child to the urology department for the management of her kidney deformities. This case contributes to the understanding of CRS and underscores the importance of comprehensive diagnostic approaches in elucidating its complex manifestations.

Can sacral development as a marker for caudal regression help identify associated urologic anomalies in patients with anorectal malformation?

BACKGROUND AND AIM

The sacral ratio (SR) is a well-established tool to quantify sacral development in patients with anorectal malformations (ARM) and can be used as a predictor of fecal continence. We hypothesized that a lower SR correlated with the presence of urologic and renal malformations.

METHODS

We retrospectively reviewed the medical records of patients with ARM treated at our center from 2014 to 2016. We measured the lateral SR as a marker for sacral development and assessed the spine for the presence of tethered cord (TC). Urological and renal anomalies, including single kidney, hydronephrosis, hypospadias, vesicoureteral reflux (VUR), ectopic ureter, and penoscrotal transposition were assessed. Analysis of variance (ANOVA), t-tests, and multivariable linear regression were used to test for differences in SR with consideration of associated urologic malformations and tethered cord.

RESULTS

283 patients with ARM were included for analysis (156 females). The median age was 39months (10-90). Among these, 178 (55.6%) had 1 or more urologic malformations, and 81 (25.3%) had a TC. Hydronephrosis, high-grade VUR (3-5), solitary kidney, and tethered cord were significantly associated with lower SR (p<0.01). In multivariable regression models, the presence of urologic abnormalities remained significantly associated with lower a SR despite the presence or absence of TC (p<0.001).

CONCLUSION

SR is a potentially useful indicator of certain urologic anomalies including hydronephrosis, high grade VUR, and solitary kidney in patients with ARM. This association is independent of the presence of TC. A sacral ratio as a part of the VACTERL screening can help the surgeon identify which patients need closer urologic follow up.

LEVEL OF EVIDENCE

IV.

Neurogenic bladder: etiology and assessment

A review of the various causes of neurologic impairment to the lower urinary tract in children was the aim of this presentation. The emphasis was on diagnosis, pathophysiology, and treatment that strive to maintain as normal a function as possible in order to achieve eventual urinary continence and health of the upper urinary tract. The latest principles based on the most up to date evidence are promulgated but with an eye towards historical prospective. The reader should gain an adequate understanding of various disorders that comprise this condition and feel comfortable with proposing options for management when faced with the responsibility of caring for an affected child.