Abdominal mass due to crossed renal ectopia and fusion

Background: A 22-year-old woman was referred to the department of Radiology, because of a painless mass at the right hemiabdomen

Lithium-Induced Nephropathy

Background: A 59-year-old man was referred for CT scan of the abdomen after repair of an eventrated appendectomy wound. The man had a known history of bipolar affective disorder, for which he had been on lithium therapy for many years. As an incidental finding, CT scan showed numerous small hypodense renal lesions. Subsequently a MRI examination was performed to further characterize these renal abnormalities

Mastication Dyspraxia: A Neurodevelopmental Disorder Reflecting Disruption of the Cerebellocerebral Network Involved in Planned Actions

This paper reports the longitudinal clinical, neurocognitive, and neuroradiological findings in an adolescent patient with nonprogressive motor and cognitive disturbances consistent with a diagnosis of developmental coordination disorder (DCD). In addition to prototypical DCD, the development of mastication was severely impaired, while no evidence of swallowing apraxia, dysphagia, sensorimotor disturbances, abnormal tone, or impaired general cognition was found. He suffered from bronchopulmonary dysplasia and was ventilated as a newborn for 1.5 months. At the age of 3 months, a ventriculoperitoneal shunt was surgically installed because of obstructive hydrocephalus secondary to perinatal intraventricular bleeding. At the age of 5 years, the patient’s attempts to masticate were characterized by rough, effortful, and laborious biting movements confined to the vertical plane. Solid food particles had a tendency to get struck in his mouth and there was constant spillage. As a substitute for mastication, he moved the unground food with his fingers in a lateral direction to the mandibular and maxillary vestibule to externally manipulate and squeeze the food between cheek and teeth with the palm of his hand. Once the food was sufficiently soft, the bolus was correctly transported by the tongue in posterior direction and normal deglutition took place. Repeat magnetic resonance imaging (MRI) during follow-up disclosed mild structural abnormalities as the sequelae of the perinatal intraventricular bleeding, but this could not explain impaired mastication behavior. Quantified Tc-99m-ethylcysteinate dimer single-photon emission computed tomography (Tc-99m-ECD SPECT), however, revealed decreased perfusion in the left cerebellar hemisphere, as well as in both inferior lateral frontal regions, both motor cortices, and the right anterior and lateral temporal areas. Anatomoclinical findings in this patient with DCD not only indicate that the functional integrity of the cerebellocerebral network is crucially important in the planning and execution of skilled actions, but also seem to show for the first time that mastication deficits may be of true apraxic origin. As a result, it is hypothesized that “mastication dyspraxia” may have to be considered as a distinct nosological entity within the group of the developmental dyspraxias following a disruption of the cerebellocerebral network involved in planned actions

Terson’s syndrome. M. Eyselbergs, M.H. Voormolen

A 55-year-old-woman suddenly woke up with the worst headache she ever experienced. The clinical picture deteriorated fast and by the time she was admitted to the emergency department, she developed anisocoria and was in a coma (Glasgow Coma Scale, 3/15). A non enhanced computed tomography of the brain was performed and revealed a subarachnoid hemorrhage (Fig. A) caused by a ruptured aneurysm of the anterior communicating artery (Fig. B, black arrow). The aneurysm was successfully treated by endovascular occlusion with coils

Multicentric carpal-tarsal osteolysis

A 2.5-year-old girl presented with pain and reduced strength in hands and wristsand walking difficulties. Clinical examination revealed a position deformity of both hands and broad elbows with limited extension

Developmental venous anomaly : MR and angiographic features

Developmental venous anomaly (DVA) is probably the most common anomaly of the intracranial vasculature. DVAs consist of multiple, radially oriented dilated medullary veins that converge into a transcerebral vein. We describe the imaging findings of this vascular anomaly in different patients and the role of different imaging modalities

Polyanisotropic Magnetoelectric Coupling in an Electrically Controlled Molecular Spin Qubit

International audienceTwo molecular spin qubits are studied with pulsed Electron Paramagnetic Resonance (EPR) spectroscopy under electric fields to assess their magnetoelectric (ME) couplings and electric spin control. [Fe 3 O(PhCOO) 6 (py) 3 ]ClO 4 ⋅py (Fe 3) is characterized by strong Dzyaloshinskii-Moriya interactions (DMI) which induce important magnetoanisotropy, whereas the DMI in [Cr 3 O(PhCOO) 6 (py) 3 ]ClO 4 ⋅0.5py (Cr 3) is 1-2 orders of magnitude weaker. Fe 3 is observed to demonstrate a clear ME effect whose intensity shows an unprecedented dependence on the molecular orientation within the electric field E (electroanisotropy) and on the relative orientations of the molecular z-axis, the Zeeman field B 0 and E (magnetoelectric anisotropy). The electric control in Fe 3 is shown to be coherent and the ME effect exhibits complex dynamics characterized by saturation and oscillatory effects. On the other hand, Cr 3 exhibits no discernible ME effect, which correlates well with its negligible DMI

Neuroradiology of acute pathologies in adults with hematologic malignancies: a pictorial review

Hematopoietic and lymphoid tumors are a heterogeneous group of diseases including lymphomas, multiple myeloma (MM), and leukemias. These diseases are associated with systemic involvement and various clinical presentations including acute neurological deficits. Adult patients with hematologic malignancies (HM) are at risk for developing a wide array of acute conditions involving the nervous system. HM in adults may present as tumoral masses responsible for mass effect, possibly resulting in acute neurological signs and symptoms caused by tumor growth with compression of central nervous system (CNS) structures. Moreover, as result of the hematologic disease itself or due to systemic treatments, hematologic patients are at risk for vascular pathologies, such as ischemic, thrombotic, and hemorrhagic disorders due to the abnormal coagulation status. The onset of these disorders is often with acute neurologic signs or symptoms. Lastly, it is well known that patients with HM can have impaired function of the immune system. Thus, CNS involvement due to immune-related diseases such as mycotic, parasitic, bacterial, and viral infections linked to immunodeficiency, together with immune reconstitution inflammatory syndrome, are frequently seen in hematologic patients. Knowledge of the etiology and expected CNS imaging findings in patients with HM is of great importance to reach a fast and correct diagnosis and guide treatment choices. In this manuscript, we review the computed tomography (CT) and magnetic resonance findings of these conditions which can be related to the disease itself and/or to their treatments