A Rare Catheter Complication in a Patient With Neuroblastoma: Horner's Syndrome.

Neuroblastoma is the most common type of extracranial solid tumor during childhood. Clinical presentation includes ipsilateral ptosis, myosis, anhydrosis and enophthalmos. The case of a 2.5-year-old boy who had a complaint of constriction of the left pupil for 3 days is presented. In the physical examination, the pupil of the OD was moderately dilated; there was myosis on the OS and ptosis on the left eyelid. Horner syndrome was considered due to these findings. History of the patient revealed that a central venous catheter insertion procedure was tried from the left side.