A case is presented with spontaneous expectoration of a small piece of soli
d tissue. Pathologic examination of the expectorated tissue was found to be
consistent with leiomyosarcoma. After further work-up, there was no eviden
ce of another primary site of leiomyosarcoma except for the right lower lob
e, Right lower lobectomy was performed. The surgical specimen showed a tu m
or that was histologically identical to the patient's previous expectorated
tissue. To the authors' knowledge, this is the first report of partial exp
ectoration of a primary endobronchial leiomyosarcoma, Copyright (C) 2001 S.
Karger AG, Basel.