Bronchial granular cell tumor. Apropos of 2 cases

: The authors report two new cases of bronchial granular cell tumour, a site which remains relatively rare. One of these cases was studied from the point of view of histoenzymology and ultrastructure. The appearances seen were identical to those seen in the literature. They lead to the problem of the histogenetics of the lesion, various morphological factors favouring a Schwann cell origin, whilst the presence of "transitional" cells is more in favour of a mesenchymatous origin, or at least the role of mesenchymatous cells in the development of these lesions.