NTRK1 and hereditary sensory and autonomic neuropathy type 4: Neurotrophic tyrosine kinase receptor 1 (NTRK1, OMIM *191315; coding tyrosine kinase receptor A [TrkA]) is located on chromosome 1q23.1 and is responsible for a rare genetic disorder, CIPA (congenital insensitivity to pain with anhidrosis) [7].