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BRAF V600E mutation does not predict recurrence after long‐term follow‐up in TNM stage I or II papillary thyroid carcinoma patients

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Abstract:

Pelttari H, Schalin‐Jäntti C, Arola J, Löyttyniemi E, Knuutila S, Välimäki MJ. BRAF V600E mutation does not predict recurrence after long‐term follow‐up in TNM stage I or II papillary thyroid carcinoma patients. APMIS 2012; 120: 380–6.

The BRAF V600E mutation may serve as a marker of disease recurrence in well‐differentiated papillary thyroid cancer (PTC). Our aim was to study if TNM stage I or II PTC patients, with and without recurrence after long‐term follow‐up would differ in BRAF status. BRAF status was retrospectively determined in tumour tissue from a cohort of low‐risk PTC patients (n = 461) with and without recurrence after 16 years of follow‐up. Initial treatment was total thyroidectomy (TTE) and radioiodine remnant ablation (RRA). Forty‐six patients (9.9%) experienced disease recurrence. BRAF mutation was positive in 66% (17/26) of patients with and 68% (17/25) without recurrence (p = NS). Fifty per cent of BRAF positive and 53% of BRAF negative patients experienced disease recurrence (p = NS). Time to recurrence was 52 (range 18–144) and 36 (range 16–71) months, respectively (p = NS). Primary tumour size, nodal metastasis and local infiltration at presentation did not differ between BRAF positive and negative patients (2.0 vs 2.2 cm, 21% vs 35% and 6% vs 12%, respectively, all p = NS). Taken together, BRAF V600E is common in Finnish patients with low‐risk PTC but does not predict recurrence after long‐term follow‐up after initial treatment with TTE and RRA.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1600-0463.2011.02844.x

Affiliations: 1: Division of Endocrinology, Department of Medicine, Helsinki University Central Hospital 2: Department of Pathology, Haartman Institute and HUSLAB, University of Helsinki and Helsinki University Central Hospital, Helsinki 3: Department of Statistics, University of Turku, Turku, Finland

Publication date: May 1, 2012

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