1 => The disorder is placed on the map based on its association with a gene, but the underlying defect is not known
2 => The disorder has been placed on the map by linkage; no mutation has been found
3 => The molecular basis for the disorder is known; a mutation has been found in the gene
4 => A contiguous gene deletion or duplication syndrome, multiple genes are deleted or duplicated causing the phenotype
| Gene Symbol | Chromosomal Location | Gene MIM number | Mapping Method | Phenotype | Phenotype MIM number | Phenotype Mapping Key |
| RET | 10q11.21 | 164761 | A, REn, Fd, Ch, D | Multiple endocrine neoplasia IIA, 171400 (3) | 171400 | 3 |
| RET | 10q11.21 | 164761 | A, REn, Fd, Ch, D | Medullary thyroid carcinoma, 155240 (3) | 155240 | 3 |
| RET | 10q11.21 | 164761 | A, REn, Fd, Ch, D | Multiple endocrine neoplasia IIB, 162300 (3) | 162300 | 3 |
| RET | 10q11.21 | 164761 | A, REn, Fd, Ch, D | Central hypoventilation syndrome, congenital, 209880 (3) | 209880 | 3 |
| RET | 10q11.21 | 164761 | A, REn, Fd, Ch, D | Pheochromocytoma, 171300 (3) | 171300 | 3 |
| RET | 10q11.21 | 164761 | A, REn, Fd, Ch, D | {Hirschsprung disease, susceptibility to, 1}, 142623 (3) | 142623 | 3 |
| RET | 10q11.21 | 164761 | A, REn, Fd, Ch, D | {Hirschsprung disease, protection against}, 142623 (3) | 142623 | 3 |