Leiomyosarcomas are very rare in lung. To date. several cases have been reported in
literatures since first discription in 1907, by Davidsohn. Pulmonary leiomyosarcoma is
classifies into primary and secondary forms. Primary from is known to be arisen from
smooth muscle in the bronchi or blood vessels. The original sites of secondary
pulmonary leiomyosacoma are usually retroperitoneal soft tissue, gastrointestinal tract or
genitourinary tract, especially uterus. We experiencced a case of pulmonary
leiomyosacoma which was found in lower lobe of right lung from 40 clears old man.
Grossly, the tumor was a round shaped well circumscribed mass with rubbery hard
consistency at the right lower lobe, measuring 7.5 ㎝ in maximum diameter. The cut
surfaces of the marts are somewhat lobulated, and short whorling pattern with focal
necrosis and hemorrhage. Microscopically, the tumor is highly cellular and composed of
interlacing bundles of spindle cells, which stow moderate pleomorphism with motoses
over 12/10 high power field. Electronmicroscopic examination reveal many numbers of
microfilamants in the cytoplasms of the tumor cells, which run parallel with longitudinal
axis of the nuclei.
This a report of a cabs and review of literature was discusses briefly.
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