Reason: please compare size of mass to previous films History: boy with NF1 and plexiform of neck. Again seen is a trans-spatial plexiform mass centered in the left retropharynx that spans from the level of the nasopharynx into the upper mediastinum, with extension and left carotid space with associated partial encasement of the great vessels, and into the left visceral space with associated distortion of the thyroid gland. The mass measures up to 4.5 cm in the AP dimension, up to 4.5 cm in the transverse dimension, and up to approximately 14 cm in the craniocaudal dimension. Lesion was remeasured on the prior study from 3/23/2015 and measures identical on the current study.There is narrowing of the oropharyngeal airway. The cervical lymph nodes appear to be unchanged. There are T2 hyperintense lesions in the cerebellum, brainstem, and middle cerebellar peduncles which appear unchanged. T2 hyperintense lesions involving the left thalamus and globus pallidus are also noted and not imaged on the recent study. Cervical and upper thoracic spinal canal remains patent.
1. Compared to 3/23/2015, there is no appreciable change in size of the plexiform neurofibroma centered in the left retropharynx at the level of the nasopharynx with extension into the left visceral space, upper mediastinum, and left carotid space with associated partial encasement of the great vessels. 2. Partially-imaged intracranial stigmata of neurofibromatosis type 1.