title: Different origin of leiomyoblastoma by immunohistochemical study.
abstract: Leiomyoblastoma has been regarded as a neoplasm of smooth muscle origin. With recent progress in immunohistostaining techniques, many clinicopathological discrepancies have been pointed out about the origin of leiomyoblastoma. It has been claimed that gastrointestinal non-epithelial tumors should be regarded as stromal tumors in order to study their origin. In the present study, we performed various forms of immunohistostaining in seven cases of leiomyoblastoma to determine their origin. One case expressed desmine and muscle specific actin and was considered to be derived from smooth muscle. Four neoplasms expressed X-100 protein (two cases were also NSE positive) and were thought to be derived from the nerve. Two cases were of unknown derivation. These results suggest that the cells of leiomyoblastoma may arise from a primitive to totipotential cell of neural lineages that may anomalously express smooth muscle filaments.
authors.affiliation: Second Department of Pathology, Kobe University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Fujimori
authors.forename: D
authors.initials: D
authors.lastname: Hirayama
authors.forename: A
authors.initials: A
authors.lastname: Gotoh
authors.forename: T
authors.initials: T
authors.lastname: Tabata
authors.forename: M
authors.initials: M
authors.lastname: Yukawa
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamura
authors.forename: K
authors.initials: K
authors.lastname: Satonaka
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
authors.forename: T
authors.initials: T
authors.lastname: Teramoto
authors.forename: S
authors.initials: S
authors.lastname: Kitazawa
mesh_terms: D000199:Actins / Q000032:analysis; D000328:Adult; D000368:Aged; D003893:Desmin / Q000032:analysis; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000737:chemistry* / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D007889:Leiomyoma / Q000737:chemistry* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009130:Muscle, Smooth / Q000473:pathology; D009418:S100 Proteins / Q000032:analysis
chemical_list: D000199:Actins; D003893:Desmin; D009418:S100 Proteins