scholarly journals Pancreatico-mediastinal fistula with a mediastinal mass lesion demonstrated by MR imaging

2002 ◽  
Vol 16 (6) ◽  
pp. 746-750 ◽  
Author(s):  
Mehmet Ö. Öksüz ◽  
Carsten Altehoefer ◽  
Jan T. Winterer ◽  
Marisa Windfuhr-Blum ◽  
Manuela Kleinschmidt ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Mediastinal Mass ◽  
Mass Lesion

Intrathecal and intraperitoneal germinomas occurring 20 years after total removal of a pineal teratoma

2002 ◽  
Vol 96 (2) ◽  
pp. 364-367 ◽  
Author(s):  
Yasushi Iwamuro ◽  
Satoru Seo ◽  
Yuki Hirose ◽  
Junya Jito ◽  
Mitsuaki Shirahata ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Systemic Chemotherapy ◽  
Spinal Tumor ◽  
Mass Lesion ◽  
Abdominal Tumor ◽  
Surgical Specimen ◽  
Content Type ◽  
Vp Shunt ◽  
Suprasellar Region ◽  
Consciousness Disturbance

✓ In 1980, a 10-year-old boy was admitted to the authors' hospital with consciousness disturbance and vomiting. Computerized tomography (CT) scans revealed a pineal mass lesion and hydrocephalus. The tumor was totally removed and a ventriculoperitoneal (VP) shunt was inserted. Histological investigation of a surgical specimen revealed that it was a teratoma. Five years later, the patient was readmitted to the same institution with polyuria. Magnetic resonance (MR) imaging revealed a mass lesion in the suprasellar region. The patient received systemic chemotherapy, and the tumor disappeared; however, 2 years after the chemotherapy, MR imaging demonstrated a right lateral ventricular mass. The tumor was totally resected, and histopathological investigation revealed a teratocarcinoma. Three years after the chemotherapy, CT scanning revealed suprasellar and right lateral ventricular tumor recurrences, for which the patient received irradiation and chemotherapy. The tumors disappeared and the patient achieved complete remission that lasted longer than 10 years. On January 25, 2000, however, he noticed hip pain. Lumbar MR imaging demonstrated a spinal tumor below L-4 and also an abdominal tumor. The abdominal tumor was totally removed, and the histological findings identified it as a germinoma. The patient received systemic chemotherapy and the tumor disappeared completely. The authors believe that the suprasellar tumor was a metachronous germinoma and that it had metastasized through the intrathecal route and the VP shunt.

Posterior Mediastinal Mass Lesion

CHEST Journal ◽  
1984 ◽  
Vol 85 (5) ◽  
pp. 683-684 ◽  
Author(s):  
Doddachallor Shivakumar ◽  
George D. Gourgoutis ◽  
Ramesh M. Shah
Keyword(s):  
Mediastinal Mass ◽  
Mass Lesion ◽  
Posterior Mediastinal Mass ◽  
Posterior Mediastinal

Combined magnetic resonance imaging– and positron emission tomography–guided stereotactic biopsy in brainstem mass lesions: diagnostic yield in a series of 30 patients

2000 ◽  
Vol 8 (2) ◽  
pp. 1-6 ◽  
Author(s):  
Nicolas Massager ◽  
Philippe David ◽  
Serge Goldman ◽  
Benoît Pirotte ◽  
David Wikler ◽  
...  
Keyword(s):  
Positron Emission Tomography ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Stereotactic Biopsy ◽  
Diagnostic Yield ◽  
Emission Tomography ◽  
Mass Lesion ◽  
Resonance Imaging ◽  
Positron Emission ◽  
Mass Lesions

In the management of brainstem lesions, the place of stereotactic biopsy sampling remains debatable. The authors compared the results of magnetic resonance (MR) imaging, positron emission tomography (PET), and histological findings obtained in 30 patients who underwent an MR image– and PET-guided stereotactic biopsy procedure for a brainstem mass lesion. Between July 1991 and December 1998, 30 patients harboring a brainstem mass lesion underwent a stereotactic procedure in which combined MR imaging and PET guidance was used. Positron emission tomography scanning was performed using [18F]-fluorodeoxyglucose in 16 patients, methionine in two patients, and with both tracers in 12 patients. Definite diagnosis was established on histological examination of the biopsy samples. Interpretation of MR imaging findings only or PET findings only were in agreement with the histological diagnosis in 63% and 73% of cases, respectively. Magnetic resonance imaging and PET findings were concordant in 19 of the 30 cases; in those cases, imaging data correlated with histological findings in 79%. In seven patients who underwent one PET-defined and one MR imaging–defined trajectory, at histological examination the PET-guided samples were more representative of the tumor's nature and grade than the MR imaging–guided samples in four cases (57%). In 18 patients PET scanning was used to define a biopsy target and provided a diagnostic yield in 100% of the cases. Although the use of combined PET and MR imaging improves radiological interpretation of a mass lesion in the brainstem, it does not accurately replace histological diagnosis that is provided by a stereotactically obtained biopsy sample. Combined information provided by MR imaging and PET in stereotactic conditions improves the accuracy of targeting and the diagnostic yield of the stereotactically biopsy sample; an MR imaging– and PET-guided stereotactic biopsy procedure is a safe and efficient modality for the management of mass lesions of the brainstem.

Paraesophageal Varices Presenting as a Retrocardiac Mediastinal Mass

1994 ◽  
Vol 35 (3) ◽  
pp. 255-257 ◽  
Author(s):  
R. Nyman ◽  
W. von Sinner ◽  
T. Mygind ◽  
I. Kagevi
Keyword(s):  
Portal Hypertension ◽  
Mr Imaging ◽  
Schistosoma Mansoni ◽  
Chest Radiograph ◽  
Mediastinal Mass ◽  
Imaging Techniques ◽  
Periportal Fibrosis ◽  
Diagnostic Work ◽  
Work Up ◽  
Diagnostic Work Up

This report is a reminder that portal hypertension with paraesophageal varices can present as a retrocardiac mass on the chest radiograph. Schistosoma mansoni, the probable etiology in this case, causes periportal fibrosis and is the most common explanation for portal hypertension worldwide. Modern imaging techniques were most helpful in the diagnostic work-up, ultrasonography revealing pathognomonic hyperechoic periportal bands, and CT and MR imaging showing the extent of collaterals.

MR imaging in a desmoid tumor of the posterior mediastinum with extension into the abdominal cavity

1998 ◽  
Vol 39 (3) ◽  
pp. 301-303
Author(s):  
E. Çiftçi ◽  
I. Erden ◽  
K. Koral ◽  
S. Akyar
Keyword(s):  
Mr Imaging ◽  
Desmoid Tumor ◽  
Mediastinal Mass ◽  
Abdominal Cavity ◽  
Posterior Mediastinum ◽  
Low Back ◽  
Previous Surgery ◽  
Posterior Mediastinal Mass ◽  
History Of ◽  
Posterior Mediastinal

We report on a rare case of desmoid tumor in a 40-year-old man with low back pain and cough. There was no history of previous surgery or trauma. MR imaging revealed a posterior mediastinal mass extending into the abdominal cavity

A new reproducible model of an epidural mass lesion in rodents. Part I: Characterization by neurophysiological monitoring, magnetic resonance imaging, and histopathological analysis

2002 ◽  
Vol 97 (6) ◽  
pp. 1410-1418 ◽  
Author(s):  
Ralf Burger ◽  
Martin Bendszus ◽  
Giles Hamilton Vince ◽  
Klaus Roosen ◽  
Anthony Marmarou
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Mass Lesion ◽  
Neurophysiological Monitoring ◽  
Histopathological Analysis ◽  
Resonance Imaging ◽  
Eeg Activity ◽  
Content Type ◽  
Fine Print

Object. The goal of this study was to characterize a new model of an epidural mass lesion in rodents by means of neurophysiological monitoring, magnetic resonance imaging, and histopathological analysis. Methods. Changes in intracranial pressure (ICP), cerebral perfusion pressure (CPP), and laser Doppler flowmetry (LDF) values, intraparenchymal tissue partial oxygen pressure (PtiO2), and electroencephalography (EEG) activity were evaluated in the rat during controlled, epidural expansion of a latex balloon up to a maximum ICP of 60 mm Hg. The initial balloon inflation was followed by periods of sustained inflation (30 ± 1 minute) and reperfusion (180 ± 5 minutes). Histopathological analysis and magnetic resonance (MR) imaging were performed to characterize the lesion. The time to maximum balloon expansion and the average balloon volume were highly reproducible. Alterations in EEG activity during inflation first appeared when the CPP decreased to 57 mm Hg, the LDF value to 66% of baseline values, and the PtiO2 to 12 mm Hg. During maximum compression, the CPP was reduced to 34 mm Hg, the LDF value to 40% of baseline, and the PtiO2 to 4 to 5 mm Hg. The EEG tracing was isoelectric during prolonged inflation and the values of LDF and PtiO2 decreased due to accompanying hypotonia. After reperfusion, the CPP was significantly decreased (p < 0.05) due to the elevation of ICP. Both the LDF value and EEG activity displayed incomplete restoration, whereas the value of PtiO2 returned to normal. Histological analysis and MR imaging revealed brain swelling with a midline shift and a combined cortical—subcortical ischemic lesion beyond the site of balloon compression. Conclusions. This novel model of an epidural mass lesion in rodents closely resembles the process observed in humans. Evaluation of pathophysiological and morphological changes was feasible by using neurophysiological monitoring and MR imaging.

scholarly journals Torsion of right lung sequestration mimicking a posterior mediastinal mass presenting as acute abdomen: Usefulness of MR imaging

2019 ◽  
Vol 14 (5) ◽  
pp. 551-554 ◽  
Author(s):  
Risa Yokota ◽  
Keiko Sakamoto ◽  
Hiroshi Urakawa ◽  
Morishige Takeshita ◽  
Kengo Yoshimitsu
Keyword(s):  
Mr Imaging ◽  
Acute Abdomen ◽  
Mediastinal Mass ◽  
Posterior Mediastinal Mass ◽  
Posterior Mediastinal

scholarly journals Malignant Lymphoma in the Parasellar Region

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Takao Koiso ◽  
Hiroyoshi Akutsu ◽  
Shingo Takano ◽  
Tetsuya Yamamoto ◽  
Eiichi Ishikawa ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Interleukin 2 ◽  
Elevated Serum ◽  
Compression Fracture ◽  
Bone Marrow Aspiration ◽  
B Cell Lymphoma ◽  
Good Prognosis ◽  
Mass Lesion ◽  
Pituitary Lymphoma ◽  
Systemic Lymphoma

The entity of pituitary (sellar or parasellar) lymphoma includes primary pituitary lymphoma (PPL) and secondary pituitary lymphoma (SPL). The latter has an involvement of systemic lymphoma. Both of these lymphomas are extremely rare. We describe a patient with SPL showing a good prognosis. A 78-year-old woman presented with diplopia, left ptosis, and back pain. Magnetic resonance (MR) imaging revealed a parasellar mass lesion extending to the upper clivus and another mass lesion with compression fracture of the Th3 vertebral body. Transsphenoidal exploration was performed, and it showed diffuse large B-cell lymphoma. Based on the positive tumor cells in the following bone marrow aspiration and hepatosplenomegaly in computed tomography (CT) findings, this patient was diagnosed as having a pituitary involvement of systemic lymphoma. After chemotherapy, she achieved complete remission for 4 years. The entity of pituitary lymphoma is extremely rare. Nineteen cases of PPL and 16 cases of SPL have been reported. Generally, clinical and radiological diagnosis was difficult because there are no specific findings. Therefore, biopsy was necessary in all of the cases. T2 hypointensity of a lesion in MR imaging in addition to an elevated serum level of soluble interleukin-2 receptor (sIL-2R) in a patient with a sellar lesion can be useful clues for the differential diagnosis of this rare disease.

Sign in / Sign up

Export Citation Format

Share Document