MRI Eye-of-the-Tiger Sign in Organophosphate Poisoning. A Case Report.

We describe the eye-of-the-tiger sign on magnetic resonance imaging (MRI) of the brain in a 40-year-old man presenting with extra pyramidal symptoms like chorea, flexion neck dystonia, tongue tremors, dysarthria and postural instability as the sequelae of organophosphorus poisoning six months previously. This typical radiological sign has been described in extrapyramidal parkinsonian disorders including cortical-basal ganglionic degeneration, early onset levodopa-responsive parkinsonism and Steele-Richardson-Olszewski syndrome (progressive supranuclear palsy) but hitherto has not been reported in insecticide poisoning. T2-weighted scans showed low signal intensity surrounding a central region of high signal intensity in the anteromedial globus pallidus (gliosis), producing an eye-of-the-tiger appearance with the central hyperintense signal intensity better appreciated in T2W and fluid attenuated inversion recovery (FLAIR) sequences.

Radiation-induced mineralizing microangiopathy in a case of recurrent craniopharyngioma. A case report.

Mineralizing microangiopathy is a late complication of radiation-induced brain injury that occurs during the treatment of CNS malignancies in children and adults. Early diagnosis of the radiation-induced brain injury helps to tailor the radiation dose and prevent further complications. Here we describe an operated oatient with craniopharyngioma who underwent external beam radiotherapy. The patient developed gradual loss of vision after two years and a review CT scan revealed the local recurrence of tumour with dystrophic calcification of the basal ganglia, frontal and temporal subcortical regions representing recurrent craniopharyngioma with radiation-induced mineralizing microangiopathy.

Typical radiological findings of lipoid proteinosis of urbach and wiethe. A case report.

Lipoid proteinosis is a rare autosomal recessive dermatosis, which can be congenital or have onset in infancy. It is characterized by the progressive deposition of an amorphous hyaline substance with a glycoprotein constitution in the skin and mucous membranes and presents as papular lesions that can aggregate forming plaques with a yellowish discoloration. We present a case of lipoid proteinosis in a seven-year-old boy where characteristic calcifications in the medial temporal lobe helped in early initiation of treatment.

Typical neuroradiological diagnosis of maple syrup urine disease as a precursor to clinical diagnosis. A case report.

Maple syrup urine disease (MSUD) is a rare inherited metabolic disorder. It is due to decreased de-carboxylation of branched-chain amino acids (leucine, valine, and isoleucine) so their accumulation gives a characteristic maple syrup odour in urine and leads to severe neurological deterioration. Early diagnosis and dietary intervention prevent complications and may allow for normal intellectual development. Various types of MSUD exist, classical MSUD being the most common and severe form of this disease. We describe a case of classical MSUD in a four- month-old infant where the MR imaging suggested the diagnosis of MSUD prior to the clinical diagnosis which was further confirmed by laboratory techniques.

Lhermitte-duclos disease with syringomyelia. A report of two cases.

Dysplastic gangliocytoma is defined as a rare cerebellar mass lesion with malformative, hamartomatous and neoplastic features, arising from cerebellar neurons and affecting the population in early adulthood. Common clinical presentation is in the form of headache, features of raised intracranial tension or hydrocephalus. It may also be found as an incidental lesion. Even though many cases of this disease entity have been reported in literature, its association with syrinx is less commonly highlighted and hence we are reporting these two cases which we encountered at our institute. Presence of an associated syrinx should not deter one to make a preoperative diagnosis of this condition once the striking imaging findings are visualized.

Polyostotic Paget's Disease with Sarcomatous Change in a Skull Lesion. A Case Report of Imaging Findings.

The most serious complication of Paget's disease is sarcomatous degeneration of pagetic bone. Multifocal sarcomatous degeneration occurs mainly in polyostotic Paget's disease. Paget sarcomas are the most threatening sarcomas of bone irrespective of the histopathology, their prognosis being far more negative than primary sarcomas. Paget's disease is a common entity but osteosarcoma arising in Paget's disease is an infrequent complication. The skull involvement is even rarer. We report a case of malignant transformation of a skull lesion in a patient of polyostotic Paget's disease. Skull radiographs, computed tomography and magnetic resonance imaging scans of the tumour area show interesting results.