“…Atonia of the efferent urinary tract is present in 46-58% of patients and is associated with recurrent urinary tract infections and even fatal complications. 138,139 Other systemic and neurologic abnormalities include ataxia, axial rigidity, seizures, startle myoclonus, tremor, gastrointestinal dysmotility, vestibular malfunction, central apnea, neurogenic upper airway collapse, ptosis, cataracts, pigmentary retinopathy, iritis, lacrimal hyposecretion, tonic pupil, ophthalmoplegia, convergence insufficiency, vertical gaze palsy, mental retardation, psychiatric abnormalities, nystagmus, short stature, primary gonadal atrophy, other endocrine abnormalities, anosmia, megaloblastic and sideroblastic anaemia, abnormal electroretinography, and elevated cerebrospinal fluid protein. 137,139,140,[143][144][145] Psychiatric disorders are also seen at an increased frequency among heterozygous carriers.…”