Ethylmalonic encephalopathy masquerading as meningococcemia

Author:

Horton Ari ElliotORCID,Hong Kai Mun,Pandithan Dinusha,Allen Meredith,Killick Caroline,Goergen StacyORCID,Springer Amanda,Phelan Dean,Marty Melanie,Halligan Rebecca,Lee Joy,Pitt JamesORCID,Chong BelindaORCID,Christodoulou JohnORCID,Lunke SebastianORCID,Stark ZornitzaORCID,Fahey MichaelORCID

Abstract

Ethylmalonic encephalopathy (MIM #602473) is a rare autosomal recessive metabolic condition caused by biallelic variants in ETHE1 (MIM #608451), characterized by global developmental delay, infantile hypotonia, seizures and microvascular damage. The microvascular changes result in a pattern of relapsing spontaneous diffuse petechiae and purpura, positional acrocyanosis and pedal edema, hemorrhagic suffusions of mucous membranes and chronic diarrhea. Here we describe an instructive case in which ethylmalonic encephalopathy masqueraded as meningococcal septicemia and shock. Ultra-rapid whole genome testing (time to result 60 hours) and prompt biochemical analysis facilitated accurate diagnosis and counselling with rapid implementation of precision treatment for the metabolic crisis related to this condition. This case provides a timely reminder to consider rare genetic diagnoses when atypical features of more common conditions are present, with an early referral to ensure prompt biochemical and genomic diagnosis.

Publisher

Cold Spring Harbor Laboratory

Subject

General Medicine

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