In adult patients gelastic epilepsy is uncommon and they tend to develop complex partial seizures with or without secondary generalization .
Generally, HHs are very rare conditions mostly presenting with precocious puberty, gelastic epilepsy, and cognitive difficulties [2, 4].
Lawson-Peralta et al., "Gelastic epilepsy
: Beyond hypothalamic hamartomas," Epilepsy and Behavior Case Reports, vol.
Gelastic epilepsy in combination with hypothalamic hamartoma and partial agenesis of the corpus callosum: A case report and review of the literature.
Cryptogenic gelastic epilepsy originating from the right temporal lobe.
 Daly and Mulder coined the term "gelastic epilepsy" in 1957.
Gelastic epilepsy is commonly seen in Hypothalamic Hamartomas, but can also be seen in other disorders like tuberous sclerosis, temporal lobe lesions, focal obstructive hydrocephalus, focal cortical dysplasia, etc.
From birth he has suffered from gelastic epilepsy
in which seizures cause uncontrollable bouts of laughing.