Related Experiment Video
Updated: Feb 6, 2026

A Protocol for Genetic Induction and Visualization of Benign and Invasive Tumors in Cephalic Complexes of Drosophila melanogaster
Published on: September 11, 2013
[Meningeal melanocytoma: aggressive evolution of a benign tumor: about 2 cases]
Mohamed Khoulali1, Mohammed Yasssine Haouas2, Jihad Mortada3
1Université Mohammed Premier, Faculté de Médecine et de Pharmacie, CHU Mohamed VI, Oujda, Maroc.
Abstract:
Meningeal melanocytomas are rare pigmented tumors affecting the central nervous system and developing in the cerebrospinal leptomeninges. We report two cases of meningeal melanocytomas showing very marked disparity in their evolution: a very long-term development of meningocerebral lesion, with malignant transformation resulting in the death of the first patient after 32 years and intramedullary ectopic location with very fast massive meningeal diffusion in the second patient. These two cases show the uncertain evolutive profile of meningeal melanocytomas. These lesions may become aggressive with poor prognosis despite an intensive therapeutic strategy.
Related Concept Videos
Aggression
The Evidence for Evolution
Convergent Evolution
Cranial and Spinal Meninges
Cranial Meninges
These meningeal layers cover the cranium. The dura mater is the outermost layer of cranial meninges. It is a thick and durable membrane of dense...
Eukaryotic Evolution
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Synteny and Evolution
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...

