Covid‐19‐related right hip monoarthritis: A case report and literature review

Key Clinical Message This article presents the case of a young patient with severe acute left hip pain who tested positive for COVID‐19. The diagnostic approach and management are presented, followed by a review of the literature. This 11‐year‐old student was admitted for acute left hip pain of abrupt onset, inflammatory, evolving for 24 h in a febrile context with no change in general condition. The initial workup revealed a hyperleukocytosis in the blood count, CRP 198.52 mg/L, and a 95 mm SV. The pelvic X‐ray was unremarkable, and the hip ultrasound showed synovial hypertrophy, with no effusion on Doppler examination. The situation worsened 24 h later with the onset of acute respiratory distress syndrome. The chest X‐ray showed bilateral alveolar interstitial lung disease, and the CT scan showed hyperdensity and crazy paving. The COVID‐19 RDT test on a nasopharyngeal sample came back positive, as did the RT‐PCR. Death occurred a few hours later in acute respiratory distress. Our case is consistent with what has been reported in the literature, but requires further study on an international scale to better define the phenotype of the disease