[When organelle positioning drives tumor progression].

Long considered mere degradative compartments, lysosomes are now recognized as key regulators of metabolism, signaling, and tumor invasion. Here, we discuss how their intracellular localization controls their function, signaling, and secretion. In melanoma, the peripheral distribution of lysosomes promotes aggressiveness and metastasis. Similar changes exist in other types of cancer, highlighting the role of lysosomal trafficking as a factor in malignancy and as a promising biomarker for diagnosis and treatment.