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Abstract
Background. Mass screening for gastric cancer has been established in Japan, and asymptomatic
submucosal tumors are often detected. This retrospective study was made to evaluate
the proper surgical management of malignant submucosal tumors of the stomach.
Methods. One hundred submucosal tumors of the stomach were surgically resected, irrespective
of symptoms and size. Up to 45% of these tumors, including 44 myogenic lesions, 23
non-Hodgkin's lymphomas, and 11 schwannomas, proved malignant. Myogenic sarcomas were
classified in low and high grades according to mitotic rates, cellularity, and pleomorphism.
Results. Thirty-five of 55 benign tumors and four of nine low-grade sarcomas underwent enucleation
only, without recurrence. The remaining five low-grade and 11 high-grade sarcomas
were treated by radical gastrectomy; the 5-year survival was 100% for the former and
80% for the latter. Eighteen patients with lymphomas underwent total or subtotal gastrectomy,
and three patients underwent noncurative resection; the 5-year survival rates were
54.2% and 0%, respectively, with a clear significant difference (p < 0.001). Adjuvant
chemotherapy was significantly superior to surgery alone (p < 0.05). Other factors
did not affect survival of lymphoma.
Conclusions. With these observations, we believe that following the patients with submucosal tumor
without surgery is not reasonable. Enucleation will suffice for low-grade sarcomas
and benign tumors; high-grade sarcomas can be well treated by gastrectomy. Total or
subtotal gastrectomy with systematic lymph node dissection when performed for cure
can provide good results for resectable lymphomas.
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Article info
Publication history
Accepted:
January 8,
1992
Identification
Copyright
© 1993 Published by Elsevier Inc.
