What is sarcoma versus metastatic disease versus lymphoma versus paraganglioma?

Different lesions. A sarcoma is a malignant lesion arising from connective and not glandular tissue such as visceral leiomyosarcoma of uterus or stomach. metastatic disease represents spread of tumor that may arise from a sarcoma or carcinoma, lymphoma is a malignant form of blood cellular disease and paraganglioma is the benign form of the lesion arising from nerve tissue. All represent different forms of disease.