Fig. 1From: Very small embryonic-like stem cells (VSELs) detected in azoospermic testicular biopsies of adult survivors of childhood cancerVSELs in testicular biopsy of azoospermic men survivors of childhood cancer. a Testicular smear showing the presence of two types of cells including Sertoli cells (with abundant cytoplasm, pale stained nuclei and prominent nucleolus) and spherical, small sized VSELs with dark stained nuclei (arrows). Please note that several fields have been combined to make this composite. (b) H & E stained testicular section showing empty tubules completely devoid of germ cells and sperm (c) Various representative fields showing Sertoli cells and VSELs at higher magnification. Scale: 20 μmBack to article page