A modified bilateral transfrontal sinus approach to the canine frontal lobe and olfactory bulb: surgical technique and five cases

2000 ◽  
Vol 36 (1) ◽  
pp. 43-50 ◽  
Author(s):  
EN Glass ◽  
A Kapatkin ◽  
C Vite ◽  
SA Steinberg
Keyword(s):  
Magnetic Resonance Imaging ◽  
Postoperative Complications ◽  
Surgical Technique ◽  
Seizure Activity ◽  
Clinical Signs ◽  
Frontal Lobes ◽  
Acute Onset ◽  
Histopathological Diagnosis ◽  
Resonance Imaging ◽  
Olfactory Bulbs

Five adult dogs presented for an acute onset of seizure activity. Magnetic resonance imaging revealed lesions in the olfactory bulbs, frontal lobes of the cerebrum, or both. A modified bilateral transfrontal sinus craniotomy was performed on each patient. The goal of removing the lesion was to relieve clinical signs and to provide tissue for histopathological diagnosis. In each instance, excision of the lesion was possible using this approach. No postoperative complications were observed. The modified bilateral transfrontal sinus craniotomy provides excellent access to the canine olfactory bulbs and frontal lobes.

Survival of a Suspected Case of Central Nervous System Cuterebrosis in a Dog: Clinical and Magnetic Resonance Imaging Findings

2006 ◽  
Vol 42 (3) ◽  
pp. 238-242 ◽  
Author(s):  
Lisa M. Tieber ◽  
Todd W. Axlund ◽  
Stephen T. Simpson ◽  
John T. Hathcock
Keyword(s):  
Magnetic Resonance Imaging ◽  
Central Nervous System ◽  
Nervous System ◽  
Magnetic Resonance ◽  
Clinical Signs ◽  
Acute Onset ◽  
Suspected Case ◽  
Female Rat ◽  
Resonance Imaging ◽  
Fluid Analysis

A 3-year-old, spayed female rat terrier was evaluated for acute onset of stupor, disorientation, and tetraparesis. Clinical signs progressed over 3 weeks to eventual right-sided hemiparesis and circling to the left. A Cuterebra spp. larva was discovered in the vomitus of the dog 2 weeks after the onset of clinical signs. Cerebrospinal fluid analysis showed chronic inflammation, and magnetic resonance imaging supported a diagnosis of a parasitic tract through the left cerebral hemisphere. Medical management included a tapering anti-inflammatory dose of prednisone. Clinical signs improved slowly over time. This is the first description of a presumptive antemortem diagnosis of canine cuterebrosis in the central nervous system.

Fibrocartilaginous Embolic Myelopathy in Five Cats

2006 ◽  
Vol 42 (3) ◽  
pp. 226-233 ◽  
Author(s):  
Jessica S. Mikszewski ◽  
Thomas J. Van Winkle ◽  
Mark T. Troxel
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Cerebrospinal Fluid ◽  
Magnetic Resonance ◽  
Clinical Signs ◽  
Acute Onset ◽  
Postmortem Examination ◽  
Resonance Imaging ◽  
Radiographic Findings ◽  
Intramedullary Lesion

Five cats had clinical signs, radiographic findings, and cerebrospinal fluid analyses consistent with fibrocartilaginous embolic myelopathy. All cats had an acute onset of nonpainful, asymmetrical spinal cord signs (paresis or paralysis of one or more limbs). Magnetic resonance imaging was performed in three cats. On T2-weighted images, an intramedullary lesion was revealed that was hyperintense to normal spinal cord gray matter. On T1-weighted images, the lesion was isointense. Three of the cats were euthanized, and postmortem examination confirmed myelomalacia with intralesional fibrocartilaginous emboli. Two cats survived and were clinically improved within 3 weeks.

A case of diagnosis of a giant fetal cervical teratoma

2018 ◽  
Author(s):  
S.V. Idimesheva, E.G. Bazhenova, V.A. Vedernikov
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ultrasound Examination ◽  
Mature Teratoma ◽  
Tumor Resection ◽  
Histopathological Diagnosis ◽  
Resonance Imaging ◽  
Cervical Tumor ◽  
Third Trimester ◽  
The Third ◽  
Cervical Teratoma

А case of ultrasound diagnosis of the giant fetal cervical tumor in the third trimester of gestation is presented. The diagnosis of a cervical teratoma was supposed by ultrasound examination and magnetic resonance imaging. The tumor resection was successfully performed at 6 days of life. Histopathological diagnosis was mature teratoma.

scholarly journals Changes of Dorsal Root Ganglion Volume in Dogs with Clinical Signs of Degenerative Myelopathy Detected by Water-Excitation Magnetic Resonance Imaging

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1702
Author(s):  
Eiji Naito ◽  
Kohei Nakata ◽  
Yukiko Nakano ◽  
Yuta Nozue ◽  
Shintaro Kimura ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Magnetic Resonance ◽  
Clinical Signs ◽  
Intervertebral Disc Herniation ◽  
Resonance Imaging ◽  
Diagnostic Potential ◽  
Water Excitation ◽  
Spinal Cord Segment ◽  
Degenerative Myelopathy

Canine degenerative myelopathy (DM) is a progressive and fatal neurodegenerative disease. However, a definitive diagnosis of DM can only be achieved by postmortem histopathological examination of the spinal cord. The purpose of this study was to investigate whether the volumetry of DRG using the ability of water-excitation magnetic resonance imaging (MRI) to visualize the DRG in dogs has premortem diagnostic value for DM. Eight dogs with DM, twenty-four dogs with intervertebral disc herniation (IVDH), and eight control dogs were scanned using a 3.0-tesla MRI system, and water-excitation images were obtained to visualize and measure the volume of DRG, normalized by body surface area. The normalized mean DRG volume between each spinal cord segment and mean volume of all DRG between T8 and L2 in the DM group was significantly lower than that in the control and the IVDH groups (P = 0.011, P = 0.002, respectively). There were no correlations within the normalized mean DRG volume between DM stage 1 and stage 4 (rs = 0.312, P = 0.128, respectively). In conclusion, DRG volumetry by the water-excitation MRI provides a non-invasive and quantitative assessment of neurodegeneration in DRG and may have diagnostic potential for DM.

scholarly journals Anterior cruciate ligament ganglion: case report

2002 ◽  
Vol 120 (6) ◽  
pp. 195-197 ◽  
Author(s):  
André Pedrinelli ◽  
Fábio Bonini Castellana ◽  
Ricardo Bragança de Vasconcellos Fontes ◽  
Rafael Ferreira Coelho ◽  
Luiz Álvaro de Menezes F°.
Keyword(s):  
Magnetic Resonance Imaging ◽  
Anterior Cruciate Ligament ◽  
Case Report ◽  
Magnetic Resonance ◽  
Cruciate Ligament ◽  
Clinical Signs ◽  
Left Knee ◽  
Pathological Examination ◽  
Resonance Imaging ◽  
Anterior Cruciate

CONTEXT: A ganglion is a cystic formation close to joints or tendinous sheaths, frequently found in the wrist, foot or knee. Intra-articular ganglia of the knee are rare, and most of them are located in the anterior cruciate ligament. The clinical picture for these ganglia comprises pain and movement restrictions in the knee, causing significant impairment to the patient. Symptoms are non-specific, and anterior cruciate ligament ganglia are usually diagnosed through magnetic resonance imaging or arthroscopy. Not all ganglia diagnosed through magnetic resonance imaging need to undergo surgical treatment: only those that cause clinical signs and symptoms do. Surgical results are considered good or excellent in the vast majority of cases. CASE REPORT: A 29-year-old male presented with pain in the left knee during a marathon race. Physical examination revealed limitation in the maximum range of knee extension and pain in the posterior aspect of the left knee. Radiographs of the left knee were normal, but magnetic resonance imaging revealed a multi-lobed cystic structure adjacent to the anterior cruciate ligament, which resembled a ganglion cyst. The mass was removed through arthroscopy, and pathological examination revealed a synovial cyst. Patient recovery was excellent, and he resumed his usual training routine five months later.

scholarly journals Negative MRI findings in a case of degenerative myelopathy in a dog : clinical communication

2009 ◽  
Vol 80 (4) ◽  
Author(s):  
M. Okada ◽  
M. Kitagawa ◽  
K. Kanayama ◽  
H. Yamamura ◽  
T. Sakai
Keyword(s):  
Magnetic Resonance Imaging ◽  
Histopathological Examination ◽  
Clinical Signs ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Clinical Communication ◽  
Bladder Control ◽  
Blood Tests ◽  
Degenerative Myelopathy ◽  
Magnetic Resonance Imaging Mri

An 11-year-old male Rough collie was submitted with paraparesis, but did not respond to medical treatment. Clinical signs worsened and the dog displayed paralysis, inability to stand and loss of voluntary bladder control, whereupon magnetic resonance imaging (MRI) was performed. No significant abnormalities were identified from MRI, blood tests, cerebrospinal fluid tests or radiography. After MRI, the dog developed dyspnoea and died. Autopsy and subsequent histopathological examination led to a diagnosis of degenerative myelopathy.

Atlantoaxial epidural abscess secondary to grass awn migration in a dog

2014 ◽  
Vol 27 (02) ◽  
pp. 155-158 ◽  
Author(s):  
U. Geissbühler ◽  
P. Karli ◽  
F. Forterre ◽  
E. Linon
Keyword(s):  
Magnetic Resonance Imaging ◽  
Case Report ◽  
Epidural Abscess ◽  
Cervical Vertebrae ◽  
Clinical Signs ◽  
Resonance Imaging ◽  
Mri Findings ◽  
History Of ◽  
Magnetic Resonance Imaging Mri ◽  
Grass Awn

SummaryA two-year-old female Lucerne Hound was presented with a one-week history of signs of progressive neck pain, inappetence, apathy, and an elevated rectal temperature. Findings of magnetic resonance imaging (MRI) were consistent with a foreign body abscess in the epidural space at the level of the first and second cervical vertebrae. A leftsided dorso-lateral atlantoaxial approach was performed, revealing an epidural abscess containing a grass awn. The clinical signs resolved within three days of surgery and the dog made a full recovery. This case report shows that grass awns can migrate to the atlantoaxial region in dogs and MRI findings lead to a suspicion of caudo-cranial migration within the spinal canal.

Inflammatory pseudotumor of the choroid plexus

2008 ◽  
Vol 108 (2) ◽  
pp. 365-369 ◽  
Author(s):  
Kosuke Miyahara ◽  
Kazuhiko Fujitsu ◽  
Saburo Yagishita ◽  
Yasunori Takemoto ◽  
Teruo Ichikawa ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Choroid Plexus ◽  
Lateral Ventricle ◽  
Inflammatory Pseudotumor ◽  
Clinicopathological Characteristics ◽  
Histopathological Diagnosis ◽  
Gait Disorder ◽  
Resonance Imaging ◽  
Left Lateral Ventricle

✓The authors report a case of inflammatory pseudotumor that developed in the choroid plexus of the lateral ventricle. The patient was a 73-year-old man who had undergone surgery for rectal cancer at another hospital 5 years earlier. He was referred to the authors' department, with his chief symptoms consisting of disorientation, right hemiparesis, and gait disorder that had gradually developed during the preceding month. On computed tomography and magnetic resonance imaging, a well-demarcated and homogeneously contrasted tumorous lesion was noted in the region from the trigone to the medial wall of the inferior horn of the left lateral ventricle. Expansion of the inferior horn was also evident. Intraoperative findings showed that the tumor originated from the choroid plexus of the lateral ventricle, and the histopathological diagnosis was inflammatory pseudotumor. There are only 4 previously reported cases of inflammatory pseudotumor that developed in the choroid plexus; the authors review the literature and discuss the clinicopathological characteristics of the condition.

Ultrasound and magnetic resonance imaging in the diagnosis of clinically significant placenta accreta spectrum disorders

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Cecilia Cavalli ◽  
Claudia Maggi ◽  
Sebastiana Gambarini ◽  
Anna Fichera ◽  
Amerigo Santoro ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Placenta Accreta ◽  
Placenta Previa ◽  
Color Doppler ◽  
Histopathological Diagnosis ◽  
Resonance Imaging ◽  
Placenta Accreta Spectrum ◽  
Clinically Significant ◽  
Placental Lacunae

Abstract Objectives We aimed to assess the performance of ultrasound (US) and magnetic resonance imaging (MRI) signs for antenatal detection of placenta accreta spectrum (PAS) disorders in women with placenta previa (placental edge ≤2 cm from the internal uterine orifice, ≥260/7 weeks’ gestation) with and without a history of previous Caesarean section. Methods Single center prospective observational study. US suspicion of PAS was raised in the presence of obliteration of the hypoechoic space between uterus and placenta, interruption of the hyperechoic uterine-bladder interface and/or turbulent placental lacunae on color Doppler. All MRI studies were blindly evaluated by a single operator. PAS was defined as clinically significant when histopathological diagnosis was associated with at least one of: intrauterine balloon placement, compressive uterine sutures, peripartum hysterectomy, uterine or hypogastric artery ligature, uterine artery embolization. Results A total of 39 women were included: 7/39 had clinically significant PAS. There were 6/18 cases of PAS with anterior placenta: hypoechoic space interruption and placental lacunae were the most sensitive sonographic signs (83%), while abnormal hyperechoic interface was the most specific (83%). On MRI, focal myometrial interruption and T2 intraplacental dark bands showed the best sensitivity (83%), bladder tenting had the best specificity (100%). 1/21 women with posterior placenta had PAS. There was substantial agreement between US and MRI in patients with anterior placenta (κ=0.78). Conclusions US and MRI agreement in antenatal diagnosis of clinically significant PAS was maximal in high-risk women. Placental lacunae on ultrasound scan and T2 intraplacental hypointense bands on MRI should trigger the suspicion of PAS.

scholarly journals Lipomatous meningioma: A rare subtype of benign metaplastic meningiomas

2017 ◽  
Vol 08 (01) ◽  
pp. 140-142 ◽  
Author(s):  
Mehmet Onur Yüksel ◽  
Mehmet Sabri Gürbüz ◽  
Osman Tanrıverdi ◽  
Sevilay Akalp Özmen
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
World Health ◽  
Histopathological Diagnosis ◽  
Resonance Imaging ◽  
Cranial Magnetic Resonance Imaging ◽  
World Health Organization Classification ◽  
The World ◽  
History Of ◽  
Health Organization

ABSTRACTLipomatous meningiomas are extremely rare subtypes of benign meningiomas and are classified as metaplastic meningioma in the World Health Organization classification. We present a 77-year-old man presented with the history of a gradually intensifying headache for the last 3 months. A right frontoparietal mass was detected on his cranial magnetic resonance imaging. The patient was operated on via a right frontoparietal craniotomy, and histopathological diagnosis was lipomatous meningioma. Distinctive characteristics of lipomatous meningiomas were discussed with special emphasis to importance of immunohistochemical examinations, particularly for its differentiation from the tumors showing similar histology though having more aggressive character.

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