J Pineal Res. 1998 Oct;25(3):147-58.
Grimoldi N, Tomei G, Stankov B, Lucini V, Masini B, Caputo V, Repetti ML, Lazzarini G, Gaini SM, Lucarini C, Fraschini F, Villani R.
Electron microscopy examination detected the presence of clusters of intermediate filaments and electrodense granules in the case of a germinoma producing melatonin.
Serum and CSF levels of melatonin.