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 |
| FIG4 | 6q21 | 609390 | R, REc, Fd | Charcot-Marie-Tooth disease, type 4J, 611228 (3) | 611228 | 3 |
| FIG4 | 6q21 | 609390 | R, REc, Fd | Amyotrophic lateral sclerosis 11, 612577 (3) | 612577 | 3 |
| FIG4 | 6q21 | 609390 | R, REc, Fd | Yunis-Varon syndrome, 216340 (3) | 216340 | 3 |
| FIG4 | 6q21 | 609390 | R, REc, Fd | ?Polymicrogyria, bilateral temporooccipital, 612691 (3) | 612691 | 3 |