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Gastrointestinal stromal tumours of the oesophagus: a clinicopathological and molecular analysis of 27 cases

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Affiliated Author(s)
강유나
Alternative Author(s)
Kang, Yu Na
Journal Title
Histopathology
ISSN
0309-0167
Issued Date
2017
Keyword
KITgastrointestinal stromal tumourmutationoesophagusprognosis
Abstract
AIMS:

Gastrointestinal stromal tumours (GISTs) may arise anywhere in the gastrointestinal tract, but are rare in the oesophagus. We describe the clinical, pathological and molecular characteristics of 27 primary oesophageal GISTs, the largest series to date.

METHODS AND RESULTS:

DNA was extracted and exons 9, 11, 13 and 17 of KIT, exons 12, 14 and 18 of PDGFRA and exon 15 of BRAF were amplified and sequenced. Oesophageal GISTs occurred in 14 men and 13 women aged between 22 and 80 years (mean: 56 years). All 27 cases were immunohistochemically positive for KIT, and 92 and 47% co-expressed CD34 or smooth muscle actin, respectively. Fifteen (71% of analysed cases) harboured KIT exon 11 mutations and one case each had a mutation in KIT exon 13 (K642E) or BRAF exon 15 (V600E). Long-term follow-up data (median, 96.5 months) were obtained for 20 cases; two patients had metastases at presentation and seven had developed local recurrence and/or metastasis after surgery. A large tumour size (≥ 10 cm), high mitotic rate (> 5/5 mm2 ), presence of a deletion mutation in KIT exon 11 involving codons 557-558 and a positive microscopic margin were associated with recurrence and metastasis. The KIT mutations identified in oesophageal GISTs are similar to those observed in gastric GISTs.

CONCLUSIONS:

Complete surgical resection with clear margins is recommended, if technically feasible, and genotyping can help to improve diagnosis and further patient management in oesophageal GIST
Department
Dept. of Pathology (병리학)
Publisher
School of Medicine (의과대학)
Citation
Guhyun Kang et al. (2017). Gastrointestinal stromal tumours of the oesophagus: a clinicopathological and molecular analysis of 27 cases. Histopathology, 71(5), 805–812. doi: 10.1111/his.13292
Type
Article
ISSN
0309-0167
DOI
10.1111/his.13292
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/41262
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Pathology (병리학)
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