text: On gross pathology, a large firm mass with necrosis and hemorrhage is the characteristic finding of<unk><unk><unk><unk><unk> . On microscopic histopathological analysis, spindle cells, nuclear atypia, mitoses, and a herring bone pattern are characteristic findings of<unk><unk><unk><unk><unk> . The neurofibromatosis type I (NF1) gene is involved in the pathogenesis of<unk><unk><unk><unk><unk> .
option_0: Malignant peripheral nerve sheath tumor pathophysiology
option_1: Myxoma pathophysiology
option_2: Schwannoma pathophysiology
option_3: Ameloblastoma pathophysiology
option_4: Ganglioneuroma pathophysiology
option_5: Meningioma pathophysiology
option_6: Neurofibroma pathophysiology
option_7: Paraganglioma pathophysiology