the distribution of collagen type iv , one of the major constituents of basement membrane , was studied immunohistologically in a series of 103 soft tissue tumors including those of peripheral nerve origin , smooth muscle origin , striated muscle origin , fibrous tissue origin , fibrohistiocytic origin , adipose tissue origin , synovial tissue origin , and blood vessel origin , paragangliomas , alveolar soft part sarcomas , granular cell tumors , and epithelioid sarcomas .
C0009333
collagen type iv
C0004799
basement