The full form of TLDM, in the context provided, is Temporal Lobe Developmental Malformations.
Temporal lobe developmental malformations (TLDM) are a group of brain abnormalities that occur during fetal development, specifically affecting the temporal lobe. The reference text mentions that TLDM with focal cortical dysplasia and balloon cells can coexist with mesial temporal sclerosis. This highlights the importance of understanding TLDM in the context of neurological disorders and epilepsy.