part_of part of part of adjacent to regional part of brain midbrain-hindbrain boundary rhombomere 1 rhombic lip upper rhombic lip rostral rhombic lip ZFA:0001442 rhombomere 01 cerebellum primordium Anterior-most region of dorsal hindbrain within rhombomere 1, adjacent the midbrain-hindbrain boundary. presumptive cerebellum UBERON:0009841 upper (rostral) rhombic lip DHBA:10665 EHDAA2:0000229 cerebellar anlage TAO:0001442