satellitosis

noun

sat·​el·​lit·​o·​sis ˌsat-ᵊl-ī-ˈtō-səs 

plural satellitoses -ˌsēz 

: the usually abnormal clustering of one type of cell around another

especially : the clustering of glial cells around neurons in the brain that is associated with certain pathological states (as oligodendroglioma)