Surgical Pathology Criteria

Gastrointestinal Tract Schwannoma

Supplemental Studies

Immunohistology

S100 100%
GFAP 64-100%
Nestin 79-96%
Collagen type IV 100%
p75 100%
CD34 0-33%
CD117, actin, desmin, neurofilaments, HMB45, myelin basic protein negative
p75 = low affinity nerve growth factor receptor

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