Malignant soft tissue tumor formed of irregular short bundles of plumpy elongated cells with vesicular elongated nuclei exhibiting focal herring bone pattern. Anaplasia and mitosis are mild to moderate.
Immunohistochemical studies were performed using appropriate positive and negative controls. The findings are as follows:
Referred paraffin blocks of Lt lower neck mass for immunihistochemical studies.
One referred paraffin block.
Lt lower neck mass, excision, immunostaining: