Differential diagnosis<unk>  can often mimic posttraumatic osseous fragments, synovial chondromatosis, ostechondroma, or anterior spur of ankle. It is not possible to distinguish DEH from osteochondroma on the basis of histopathology alone. Special molecular tests of the genes EXT1, EXT2 are used for the analysis of genetic expressions. These are within normal ranges in DEH, while they are lower in ostechondroma (owing to a mutation). These tests are expensive and the diagnosis is often made on clinical and radiological findings. Synovial chondromatosis occurs in a much older age group and can be ruled out on this basis.
Trevor disease
Cimino fistula
Anal fissure
Hartnup disease
De Garengeot's hernia
Zenker's degeneration
Imperforate anus
Killian–Jamieson diverticulum