Synovial sarcomas are the most common sarcomas of the extremities. However. they are rarely seen in the head and neck region and only 2 cases in the nape of the neck have been reported in the literature. Hemangiopericytomas are neoplasms of vascular origin that are rarely seen in the head and neck region. https://parisnaturalfoodes.shop/product-category/s-o-d/