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Dermatomyositis associated with angiotropic lymphoma.
S M Langan1, S O'Briain, L Barnes
1Department of Dermatology, St James's Hospital, Dublin, Ireland.
Clinical and Experimental Dermatology
|November 18, 2003
Summary
This study reports a rare case of angiotropic T-cell lymphoma associated with dermatomyositis sine myositis. This discovery highlights a new cutaneous lymphoma variant linked to this autoimmune condition.
Area of Science:
- Dermatology
- Oncology
- Rheumatology
Background:
- Dermatomyositis sine myositis is an idiopathic inflammatory myopathy characterized by skin manifestations without muscle involvement.
- Cutaneous lymphomas are a heterogeneous group of extranodal non-Hodgkin lymphomas.
- Previous associations between dermatomyositis and cutaneous lymphoma have primarily involved mycosis fungoides.
Observation:
- A 64-year-old male patient presented with atypical cutaneous plaques and nodules.
- Initial diagnostic workup did not identify any underlying malignancy.
- The patient later developed systemic illness, prompting repeat biopsies.
Findings:
- Repeat biopsies confirmed angiotropic T-cell lymphoma in the cutaneous nodules.
- This represents the first documented instance of angiotropic T-cell lymphoma occurring in conjunction with dermatomyositis sine myositis.
- This finding expands the spectrum of cutaneous lymphomas associated with dermatomyositis.
Implications:
- This case broadens the understanding of potential paraneoplastic syndromes in dermatomyositis.
- It underscores the importance of vigilant monitoring and re-biopsy in patients with dermatomyositis presenting with unusual skin lesions.
- Further research is warranted to elucidate the pathogenetic mechanisms linking dermatomyositis and angiotropic T-cell lymphoma.