Fig. 1

Imaging of initial treatment of this new reported case. a, The lesion (labeled with asterisk) was covered with normal mucosa without any ulcerations by flexible laryngoscopy. b, The majority of the tumor consisted of spindle-shaped cells with nucleus located centrally and eosinophilic-abundant cytoplasm (HE staining × 20). c, Immunohistochemistry was positive for myogenin, EMA, desmin and myoD1 (Original magnification for all slides is ×20.) d, MRI imaging showed the right vocal cord swelling several days after the first operation. e, On evaluations with MRI 1 year after the first multi-treatment, there was complete regression of the disease. Scale: 50um