Juvenile Idiopathic Arthritis In Infant With Harlequin Ichthyosis

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Clinical presentation at birth a; Swelling of the right knee b, mimicking a septic arthritis, at 3 months of life

A boy weighing 2.300 g was born by cesarean section at 35 weeks due to Premature Rupture of the Membrane (PROM). The pregnancy was uneventful and the parents were not related.

Clinical presentation

The neonate was born with auditory ducts ending in the neck, dysmorphism of the ear cartilage, flattened nose, eclabium, ectropion, opaque plate-like keratotic scaled with deep red fissures and thickened skin. In addition, fingers and toes presented with pseudo-syndactyly, strictures and flexion contractures.

The clinical findings were consistent with the diagnosis of juvenile idiopathic arthritis with Harlequin Ichthyosis. Moreover, genetic testing confirmed the clinical suspicion Harlequin Ichthyosis, a more severe variant of autosomal recessive ichthyosis.

Rare skin disorder

Harlequin Ichthyosis is a rare genetic disorder that mainly affects the skin. It is potentially lethal and is associated with severe morbidity. Neonates with the disorder present with thick-plaque like scales all over the body associated with joint contractures, electrolyte imbalance, pain, recurrent infections and poor thermoregulation. Whereas, juvenile idiopathic arthritis manifests before the age of 16 years and persists for more than 6 weeks. An association between the two pathologies is a very rare event, moreover, a diagnostic and therapeutic challenge.

Treatment plan

The neonate was started on oral retinoids since day one. Similarly, underwent global care to prevent or reduce extracutaneous complications and improve skin hydration. Skin treatment included ointments containing vaseline, paraffin oil and glycerin for six times a day. The vaseline was also applied on the eyebrows and scalp. The baby also underwent multiple platelets and red cells transfusions for anaemia and thrombocytopenia and intravenous antibiotics for recurrent sepsis.

Severe bilateral transmissive deafness was detected at 2 months because of otodisplasia. At 3 months, there was marked swelling of the right knee with a presentation similar to septic arthritis. The baby was initially treated with systemic antibiotics with an unsatisfactory response. Athrocenthesis with aspiration of yellow turbid synovial fluid and subsequent intra-articular injection of triamcinolone hexacetonide was administered. A year later, complete remission of the right knee was obtained with no side effects or limitation. Moreover, no other joints had been involved in the meantime.

References

Auriti, C., Rotunno, R., Diociaiuti, A., Manzoni, S. M., Uva, A., Bersani, I., … & El Hachem, M. (2020). Juvenile idiopathic arthritis in infants with Harlequin Ichthyosis: two cases report and literature review. Italian Journal of Pediatrics46(1), 1-6.

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Dr. Aiman Shahab is a dentist with a bachelor’s degree from Dow University of Health Sciences. She is an experienced freelance writer with a demonstrated history of working in the health industry. Skilled in general dentistry, she is currently working as an associate dentist at a private dental clinic in Karachi, freelance content writer and as a part time science instructor with Little Medical School. She has also been an ambassador for PDC in the past from the year 2016 – 2018, and her responsibilities included acting as a representative and volunteer for PDC with an intention to make the dental community of Pakistan more connected and to work for benefiting the underprivileged. When she’s not working, you’ll either find her reading or aimlessly walking around for the sake of exploring. Her future plans include getting a master’s degree in maxillofacial and oral surgery, settled in a metropolitan city of North America.

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