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  • Title: Clinical and laboratory features between anti-TIF1γ dermatomyositis with and without malignancy: 37 case series and a review.
    Author: Tang KY, Zhang HL, Zhang XY, Jin HZ.
    Journal: J Dermatol; 2024 Dec; 51(12):1646-1657. PubMed ID: 39258818.
    Abstract:
    We aimed to analyze the clinical profile and malignancy indicators in dermatomyositis (DM) with anti-transcriptional intermediary factor 1 antibody (anti-TIF1γ-Ab). A comparison was made between clinical information of anti-TIF1γ DM patients with and without malignancy. Additionally, a review of the literature on anti-TIF1γ DM and malignancy was conducted by searching PubMed and EMBASE databases. In our cohort of 37 patients, 27.0% (10/37) developed malignancy. The timeframe during which these 10 patients developed malignancy ranged from 21 months prior to the diagnosis of DM to 36 months following the diagnosis of DM. Specifically, one patient was diagnosed with breast cancer at the age of 36. Comparing the groups with and without malignancy, we found that age over 65 years (40% vs 7.4%, P = 0.035), a shorter duration from the onset of symptoms to the diagnosis of DM (2.5 vs 10 months, P = 0.003), and higher erythrocyte sedimentation rate (ESR) levels (23 vs 10 mm/h, P = 0.048) were found to be associated with an increased risk of malignancy. Conversely, the presence of Gottron's papules (63% vs 20%, P = 0.029) may suggest a lower likelihood of malignancy. The literature review revealed that the prevalence of myositis-associated malignancy was 40.7% (340/836), with variations ranging from 19% to 82.9% across different series. In summary, factors such as age over 65 years, a shorter duration between symptom onset and diagnosis of DM, and elevated ESR levels may indicate an increased risk of malignancy in anti-TIF1γ DM patients.
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