Similarly, children with mutations in the neuroendocrine-specific enzyme prohormone convertase 1/3 present early-onset obesity, reactive hypoglycemia, enteropathy, impaired proopiomelanocortin processing (with consequent decrease in ACTH plasma concentrations) and neuroendocrine dysfunction [23], features that were not present in our patient. The gene discussed is PCSK1; the disease is Abnormal intestine morphology.