Orocraniofacial findings of a Pediatric Patient with Joubert Syndrome

Analysis of CT and MRI Manifestations of Joubert Syndrome

Objective

To investigate the computed tomography and magnetic resonance imaging manifestations of Joubert syndrome (JS).

Method

In this retrospective analysis, we investigated the clinical and imaging characteristics of JS in a cohort of twelve pediatric patients with confirmed diagnoses. Specifically, we analyzed both computed tomography (CT) and magnetic resonance imaging (MRI) manifestations in this population. CTs were performed on four patients and MRIs were performed on twelve, respectively.

Results

JS is characterized by specific CT and MRI findings, including midline fissure, batwing, or triangular formations of the fourth ventricle between the bilateral cerebellar hemispheres, and molar sign at the midbrain level. All twelve cases in this cohort exhibited these traits, along with other cerebral abnormalities, such as dysplasia of the corpus callosum in two cases, gray matter heterotopia in one case, and occipital meningocele in one case.

Conclusion

JS has distinctive CT and MRI characteristics that can be clinically identified.

A Brief Focus on Joubert Syndrome and Related Acute Complications

Joubert syndrome (JS) and related disorders are a group of congenital anomalies syndromes in which the obligatory hallmark is the molar tooth sign, a complex midbrain–hindbrain malformation. Moreover, JS may be associated with multiorgan involvement, mainly nephronophthisis, hepatic fibrosis, retinal dystrophy, and other abnormalities with both inter- and intra-familial variability. Therefore, these patients should be followed by both diagnostic protocol and multidisciplinary approach to assess multiorgan involvement. Here, we briefly summarize the possible complications in patients with JS.

Neonatal Joubert Syndrome With Renal Involvement and Respiratory Distress

Joubert syndrome (JS) is a rare autosomal recessive neurodevelopmental disorder with characteristic clinical presentation of hyperpnea-apnea spells, hypotonia, dysmorphic facies, and nystagmus and imaging features of molar tooth sign and cerebellar vermian hypoplasia-dysplasia. Early diagnosis is needed for timely management and favorable outcome. We present a case of neonatal JS with renal involvement presenting with respiratory distress and highlight the characteristic clinical and imaging findings. On examination, the baby had low set ears, a large protruding tongue, hypertelorism, and a depressed nasal bridge. Ultrasonography (USG) abdomen showed echogenic kidneys with cortical and medullary cysts. Magnetic Resonance Imaging (MRI) brain showed classical molar tooth sign, vermian hypoplasia-dysplasia, and thinning of the corpus callosum.

Treatment of dental caries in a patient with Joubert syndrome without the use of sedatives: A case study

BACKGROUND

Joubert syndrome (JS) is a rare autosomal recessive inherited ciliopathy caused by gene mutation. Manifestations can include intermittent dyspnea, apnea, ataxia, and other nervous system abnormalities.

CASE PRESENTATION

The patient was a 21-year-old female with JS, severe intellectual disability, cerebral palsy, and epilepsy. Dental caries in both mandibular lower first molars was diagnosed by a local dentist, and the patient was referred to us for further treatment. Although her oral hygiene was good, the dental caries had reached the vicinity of the dental pulp. The caries had developed symmetrically on both first molars and was completely covered with the gingiva. As she was hesitant to receive treatment without anxiolysis, we considered using general anesthesia or intravenous sedation. However, we were recommended against it by the patient's family doctor because of the risk of apneic episodes in JS. Accordingly, dental treatment was performed over multiple days through physical behavior adjustment, while providing oxygenation (3 L/min) in preparation for an apneic episode. The dental treatment was successfully completed with a good postoperative outcome.

CONCLUSIONS

Dental treatment can be safely performed in patients with JS through physical behavior adjustment, thereby minimizing the risk of an apnea attack.