Jejunal Gastrointestinal Stromal tumor (GIST) (8 of 86)
Case description
GI stromal tumors (GISTs) are a subset of GI
mesenchymal tumors of varying differentiation. Previously,
these tumors were classified as GI leiomyomas,
leiomyosarcomas, leiomyoblastomas, or schwannomas as a
result of their histologic findings and apparent origin in the
muscularis propria layer of the intestinal wall. With the
advent of immunohistochemical staining techniques and
ultrastructural evaluation, GISTs now are recognized as a
distinct group of mesenchymal tumors. In the present
classification, GISTs account for approximately 80% of GI
mesenchymal tumors.
mesenchymal tumors of varying differentiation. Previously,
these tumors were classified as GI leiomyomas,
leiomyosarcomas, leiomyoblastomas, or schwannomas as a
result of their histologic findings and apparent origin in the
muscularis propria layer of the intestinal wall. With the
advent of immunohistochemical staining techniques and
ultrastructural evaluation, GISTs now are recognized as a
distinct group of mesenchymal tumors. In the present
classification, GISTs account for approximately 80% of GI
mesenchymal tumors.
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