“…the crystalloid-nega tive lutein cell mimicking the theca interna, the crystal loid-positive Leydig cell and the adrenocortical cell [22], Like its relative, the hilus cell, this highly steroidogenic cell is affected by hyperplasia and neoplasia. Diffuse, focal or nodular hyperplasia of the crystalloid-negative and crystalloid-positive steroid cell gives rise to hyperthecosis [ 1,[15][16][17] and stromal Leydig cell hyperplasia [5,6], respectively. These two androgenic states are only distin guished by the presence or absence of Reinke crystalloids and can be primary or secondary to a variety of primary or metastatic ovarian tumors [9], Primary neoplasms of these steroid cells, which used to be called lipid or lipoid cell tumors, are now classified according to their morphologic and functional expression [1,3].…”