The Journal of Bone and Joint Surgery 78:126-40 (1996)
© 1996 The Journal of Bone and Joint Surgery, Inc.
Instructional Course Lecture |
Instructional Course Lectures, The American Academy of Orthopaedic Surgeons - Evaluation, Diagnosis, and Classification of Benign Soft-Tissue Tumors*
FRANK J. FRASSICA, M.D. , BALTIMORE, MARYLAND and
ROBY C. THOMPSON, JR., M.D. , MINNEAPOLIS, MINNESOTA
An Instructional Course Lecture, The American Academy of Orthopaedic Surgeons
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Introduction
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Lumps and bumps on the extremities and trunk are common presentations to physicians and surgeons. These growths range from benign neoplasms and cystic structures based in the epidermis and dermis to malignant neoplasms arising within the structures below the deep fascia. These soft-tissue lesions are classified according to the direction of differentiation of the mesenchymal tissue (Table I). Most soft-tissue lesions are benign; however, benign and malignant soft-tissue lesions can present in a similar fashion. In addition, the diverse lesions within the classification system and the unfamiliarity of many pathologists with soft-tissue lesions may make the correct diagnosis difficult. The annual incidence of new sarcoma cases in the United States is about 5000. While Enzinger and Weiss11 suggested that there are at least 100 benign soft-tissue tumors for every malignant tumor examined by a pathologist, the incidence of benign lesions is unknown. This heavy preponderance of benign lesions . . . [Full Text of this Article]

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