Nonenhanced head. Similar to prior MRI exam there is revisualization of changes in the posterior fossa consistent with Dandy-Walker variant malformation. Large fourth ventricle measures similar to prior exam 23 mm in transverse axis and in midline. Images through the supratentorial space demonstrate stable asymmetric right lateral ventriculomegaly and surrounding parenchymal white matter low attenuation. The right lateral ventricle measures maximum of 23 mm in transverse axis similar to prior study. Normal size of the left lateral ventricle and the third similar to prior exam. Unremarkable cerebral cortex, cortical sulci and preserved gray-white differentiation. The cortical sulci and the CSF cisterns remain patent and is stable since prior study.
anatomical entity_fin: {'head': {}}clinical findings_fin: {'nonenhanced head': {'clinical finding': 'nonenhanced head'}}location descriptor_fin: ['posterior']clinical findings_fin: {'changes': {'clinical finding': 'changes', 'existence': 'pos_dx', 'observation': 'change'}, 'dandy-walker variant': {'clinical finding': 'dandy-walker variant', 'existence': 'pos_dx', 'descriptive_term': 'dandy-walker', 'observation': 'variant'}}size_fin: [{'size': '23 mm', 'size_descriptor': 'ventricle'}]anatomical entity_fin: {'fourth ventricle': {}, 'axis': {}}location descriptor_fin: ['midline']clinical findings_fin: {'large fourth ventricle measures similar to prior exam 23 mm in transverse axis and in midline': {'clinical finding': 'large fourth ventricle measures similar to prior exam 23 mm in transverse axis and in midline'}}location descriptor_fin: ['right', 'lateral']clinical findings_fin: {'stable asymmetric right lateral ventriculomegaly': {'clinical finding': 'stable asymmetric right lateral ventriculomegaly', 'existence': 'unc_dx', 'descriptive_term': 'stable asymmetric right lateral', 'observation': 'ventriculomegaly', 'strength_term': 'stable', 'change_term': 'stable'}, 'surrounding parenchymal white matter low attenuation': {'clinical finding': 'surrounding parenchymal white matter low attenuation', 'existence': 'pos_dx', 'descriptive_term': 'surrounding parenchymal white matter low', 'observation': 'attenuation'}}size_fin: [{'size': '23 mm', 'size_descriptor': 'ventricle'}]anatomical entity_fin: {'right lateral ventricle': {}, 'axis': {}}clinical findings_fin: {'maximum of 23 mm in transverse axis similar to prior study': {'clinical finding': 'maximum of 23 mm in transverse axis similar to prior study'}}anatomical entity_fin: {'left lateral ventricle': {}}clinical findings_fin: {'normal size of the left lateral ventricle and the third similar': {'clinical finding': 'normal size of the left lateral ventricle and the third similar', 'cf_snomed': {'normal size': 53461003}}}anatomical entity_fin: {'cerebral cortex': {}}clinical findings_fin: {'preserved gray-white differentiation': {'clinical finding': 'preserved gray-white differentiation', 'existence': 'pos_dx', 'descriptive_term': 'preserved gray-white', 'observation': 'differentiation', 'change_term': 'preserved'}}clinical findings_fin: {'patent': {'clinical finding': 'patent', 'existence': 'neg_dx', 'observation': 'patent'}}
<s>[INST] Write the finding section for a radiology report based on the following information: anatomical entity_fin: {'head': {}}clinical findings_fin: {'nonenhanced head': {'clinical finding': 'nonenhanced head'}}location descriptor_fin: ['posterior']clinical findings_fin: {'changes': {'clinical finding': 'changes', 'existence': 'pos_dx', 'observation': 'change'}, 'dandy-walker variant': {'clinical finding': 'dandy-walker variant', 'existence': 'pos_dx', 'descriptive_term': 'dandy-walker', 'observation': 'variant'}}size_fin: [{'size': '23 mm', 'size_descriptor': 'ventricle'}]anatomical entity_fin: {'fourth ventricle': {}, 'axis': {}}location descriptor_fin: ['midline']clinical findings_fin: {'large fourth ventricle measures similar to prior exam 23 mm in transverse axis and in midline': {'clinical finding': 'large fourth ventricle measures similar to prior exam 23 mm in transverse axis and in midline'}}location descriptor_fin: ['right', 'lateral']clinical findings_fin: {'stable asymmetric right lateral ventriculomegaly': {'clinical finding': 'stable asymmetric right lateral ventriculomegaly', 'existence': 'unc_dx', 'descriptive_term': 'stable asymmetric right lateral', 'observation': 'ventriculomegaly', 'strength_term': 'stable', 'change_term': 'stable'}, 'surrounding parenchymal white matter low attenuation': {'clinical finding': 'surrounding parenchymal white matter low attenuation', 'existence': 'pos_dx', 'descriptive_term': 'surrounding parenchymal white matter low', 'observation': 'attenuation'}}size_fin: [{'size': '23 mm', 'size_descriptor': 'ventricle'}]anatomical entity_fin: {'right lateral ventricle': {}, 'axis': {}}clinical findings_fin: {'maximum of 23 mm in transverse axis similar to prior study': {'clinical finding': 'maximum of 23 mm in transverse axis similar to prior study'}}anatomical entity_fin: {'left lateral ventricle': {}}clinical findings_fin: {'normal size of the left lateral ventricle and the third similar': {'clinical finding': 'normal size of the left lateral ventricle and the third similar', 'cf_snomed': {'normal size': 53461003}}}anatomical entity_fin: {'cerebral cortex': {}}clinical findings_fin: {'preserved gray-white differentiation': {'clinical finding': 'preserved gray-white differentiation', 'existence': 'pos_dx', 'descriptive_term': 'preserved gray-white', 'observation': 'differentiation', 'change_term': 'preserved'}}clinical findings_fin: {'patent': {'clinical finding': 'patent', 'existence': 'neg_dx', 'observation': 'patent'}} [/INST] Nonenhanced head. Similar to prior MRI exam there is revisualization of changes in the posterior fossa consistent with Dandy-Walker variant malformation. Large fourth ventricle measures similar to prior exam 23 mm in transverse axis and in midline. Images through the supratentorial space demonstrate stable asymmetric right lateral ventriculomegaly and surrounding parenchymal white matter low attenuation. The right lateral ventricle measures maximum of 23 mm in transverse axis similar to prior study. Normal size of the left lateral ventricle and the third similar to prior exam. Unremarkable cerebral cortex, cortical sulci and preserved gray-white differentiation. The cortical sulci and the CSF cisterns remain patent and is stable since prior study. </s>