Microsporidial myositis, keratitis and hypercalcaemia in a cystic fibrosis lung transplant recipient.
BMJ case reports(2022)
Abstract
A man in his 50s was admitted with 4 months of myalgia, headaches, hypercalcaemia and declining renal function on a background of lung transplantation for cystic fibrosis 5 years prior. MRI confirmed myositis and a muscle biopsy revealed invasive muscular microsporidial infection. Positron emission tomography(PET)/CT revealed widespread dissemination of the infection. Albendazole was commenced and after a 1 week systemic inflammatory response syndrome, the patient made a significant recovery and was discharged home. PCR testing confirmed the species as Anncaliia algerae, which is known to infect mosquitoes, larvae and contaminate water supplies. This case highlights the need to relentlessly pursue a diagnosis and to consider atypical pathology in immune compromised patients. A tissue sample yielded highly beneficial and unexpected results. A multispecialty approach was essential given the varied infection manifestations, which included myositis, keratitis and possible central nervous system, vocal cord, parapharyngeal and renal involvement.
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Key words
Infectious diseases,Chronic renal failure,Musculoskeletal syndromes,Cystic fibrosis,Calcium and bone
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