NRXN1 deletions are associated with multiple neuropsychiatric and developmental disorders and have been previously linked to TS/PTD by Huang et al.[10] We observed only weak evidence to support Huang et al.’s other identified significant association between TS/PTD and duplications of CNTN6 (28 in cases, 19 in controls, nominal p = 0.039, adjusted p = 0.44). This evidence concerns the gene NRXN1 and Bjornstad syndrome.