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Sarcoidosis and HTLV-1 infection
D H McKee1, A C Young, M Haeney
1Department of Neurology, Greater Manchester Centre for Clinical Neurosciences, Hope Hospital, Stott Lane, Salford M6 8HD, UK. david@mckee490.freeserve.co.uk
Journal of Clinical Pathology
|August 30, 2005
Summary
Human T cell lymphotropic virus type 1 (HTLV-1) infection can cause a delayed neurological disorder, HTLV-1 associated myelopathy, mimicking sarcoidosis. Consider HTLV-1 in immune disorder diagnoses for at-risk individuals.
Area of Science:
- Neurology
- Infectious Diseases
- Immunology
Background:
- Human T cell lymphotropic virus type 1 (HTLV-1) is a retrovirus linked to various immune-related disorders.
- Early diagnosis of HTLV-1 infection can be challenging due to its long asymptomatic period and diverse clinical manifestations.
Observation:
- An individual initially presented with an abnormal chest x-ray suggestive of sarcoidosis, which was later ruled out by normal pulmonary function tests and biopsy.
- The patient remained asymptomatic for a decade before developing progressive spastic paraparesis, a neurological condition.
Findings:
- Antibodies to HTLV-1 were detected in serum and cerebrospinal fluid, confirming a diagnosis of HTLV-1 associated myelopathy (HAM).
- The patient's history indicated potential sexual exposure to HTLV-1 many years prior to symptom onset.
- HTLV-1 is known to cause a spectrum of conditions, including a pulmonary sarcoid-like syndrome.
Implications:
- This case highlights the importance of considering HTLV-1 infection in the differential diagnosis of neurological and immune disorders, especially in at-risk populations.
- Early identification and diagnosis of HTLV-1 are crucial for managing associated myelopathy and other immune-related conditions.
- The chronic, proinflammatory nature of HTLV-1 warrants its consideration in individuals presenting with unexplained immune system dysregulation.