scholarly journals The Need for Surgery of Isolated Sphenoid Sinus Disease Care Based on Imaging Findings

2021 ◽  
Author(s):  
Kensuke Uraguchi ◽  
Takaya Higaki ◽  
Kenichi Kozakura ◽  
Akira Doi ◽  
Seiichiro Makihara ◽  
...  
Keyword(s):  
Conservative Treatment ◽  
Signal Intensity ◽  
Clinical Symptoms ◽  
Bone Erosion ◽  
High Signal Intensity ◽  
Severe Illness ◽  
Clinical Aspects ◽  
High Signal ◽  
Imaging Findings ◽  
T2 Weighted Images

Abstract Background: In general, ISSD may be detected due to clinical symptoms, but some ISSDs are found incidentally during radiological examinations for the assessment of unrelated diseases. This study aims to evaluate the clinical aspects of all ISSDs detected by image inspection. Methods: A total of 94 patients with ISSD were enrolled in this study. The study patients were classified into two groups: a group who improved with conservative treatment (n=25), and a group who did not improve with conservative treatment (n=69). Their clinical symptoms, medical histories, pathologies, and imaging findings were assessed.Results: The incidence of high signal intensity on T2-weighted images in the improvement group was significantly higher compared with the non-improvement group. Conversely, the incidences of bone erosion and expansion were significantly higher in the non-improvement group. Of the 42 cases receiving surgery, 10 cases (23.8%) had asymptomatic ISSD.Conclusion: This study suggests that ISSD with high signal intensity on T2-weighted images and/or without bone erosion and expansion in imaging findings could improve by conservative treatment or watchful waiting. Because some asymptomatic ISSD cases required surgery, proper diagnosis of ISSD regardless of clinical symptoms is important to prevent severe illness.

Case 13.6

2014 ◽  
pp. 625-625
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Chest Wall ◽  
Signal Intensity ◽  
High Signal Intensity ◽  
High Signal ◽  
Multiple Regions ◽  
Lateral Chest ◽  
Wall Mass ◽  
Chest Wall Mass ◽  
T2 Weighted Images

3-year-old girl with a chest wall mass that her mother noticed Axial (Figure 13.6.1) and coronal (Figure 13.6.2) FSE T2-weighted images demonstrate a large heterogeneous mass that has multiple regions of high signal intensity and occupies much of the left hemothorax. Note involvement of the lateral chest wall and a lower rib best seen on the coronal images....

MR Findings of Ejaculatory Duct Cysts

1994 ◽  
Vol 35 (5) ◽  
pp. 459-462 ◽  
Author(s):  
Y. Robert ◽  
J.-M. Rigot ◽  
N. Rocourt ◽  
L. Lemaitre ◽  
J. Biserte ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Signal Intensity ◽  
Ejaculatory Duct ◽  
High Signal Intensity ◽  
Cyst Fluid ◽  
High Signal ◽  
Rare Type ◽  
T1 And T2 ◽  
Prostatic Gland ◽  
T2 Weighted Images

Ejaculatory duct cysts are a rare type of prostatic cysts. We report 3 cases of symptomatic ejaculatory duct cysts which have been explored by MR imaging. The MR findings were round or oval masses, medial or paramedial in the prostatic gland above the level of the verumontanum, extending into the prostatic base. They displayed a low signal intensity on T1-weighted images and high signal intensity on T2-weighted images (2 cases) or high signal intensity on both T1- and T2-weighted images (1 case). The diagnosis was confirmed by an ultrasonographically guided transperineal aspiration demonstrating spermatozoa in the cyst fluid.

scholarly journals Neurotized Free Muscle Flaps can Produce MRI Changes Mimicking Tumour Recurrence

Sarcoma ◽  
2005 ◽  
Vol 9 (3-4) ◽  
pp. 133-136
Author(s):  
J. K. O’Neill ◽  
J. A. Barrett ◽  
T. Cobley ◽  
V. Devaraj ◽  
D. A. T. Silver
Keyword(s):  
Signal Intensity ◽  
Pathological Condition ◽  
Soft Tissue Sarcomas ◽  
Muscle Flap ◽  
High Signal Intensity ◽  
High Signal ◽  
Muscle Flaps ◽  
Magnetic Resonance Imaging Mri ◽  
Mri Changes ◽  
T2 Weighted Images

Soft tissue sarcomas are investigated by magnetic resonance imaging (MRI) both for initial staging and follow-up. We describe the presence of increased signal on T2-weighted images caused by a neurotized muscle flap following reconstructive surgery. This raised concern about possible sarcoma recurrence that was not clinically evident. On post-operative imaging of sarcomas the presence of recurrent tumour is indicated by a mass and high signal intensity on T2-weighted images. However, high signal changes in skeletal muscle on T2-weighted images are not specific. In this case, the free functioning muscle transfer with neurotization of the flap mimicked recurrence on MR scan. High signal intensity on T2-weighted images in muscle is an indication of either a physiological change or a pathological condition and must be taken in context of the clinical picture.

Case 14.22

2014 ◽  
pp. 716-717
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Signal Intensity ◽  
Pelvic Mass ◽  
High Signal Intensity ◽  
High Signal ◽  
Medical Facility ◽  
Male Adolescent ◽  
Testicular Pain ◽  
T1 And T2 ◽  
T2 Weighted Images

17-year-old male adolescent with intermittent testicular pain; CT from another medical facility demonstrated a pelvic mass Axial FSE T1-weighted images (Figure 14.22.1) and fat-suppressed FSE T2-weighted images (Figure 14.22.2) demonstrate a large heterogeneous pelvic mass with regions of high signal intensity on both T1- and T2-weighted images and a more solid-appearing component posteriorly. Axial postgadolinium 2D SPGR images (...

Case 6.6

2014 ◽  
pp. 293-294
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Genetic Disease ◽  
Signal Intensity ◽  
Adrenal Mass ◽  
High Signal Intensity ◽  
High Signal ◽  
Diffusion Weighted Image ◽  
Weighted Image ◽  
Diffusion Weighted ◽  
T2 Weighted Images

35-year-old woman with a genetic disease Axial fat-suppressed FSE T2-weighted images (Figure 6.6.1) demonstrate a large right adrenal mass with scattered regions of high T2-signal intensity. The lesion shows moderately high signal intensity on diffusion-weighted image (b=600 s/mm2) (Figure ...

MRI of aggressive fibromatosis: Frequent appearance of high signal intensity on T2-weighted images

1990 ◽  
Vol 8 (5) ◽  
pp. 583-588 ◽  
Author(s):  
Rick Feld ◽  
D.Lawrence Burk ◽  
Peter McCue ◽  
Donald G. Mitchell ◽  
Richard Lackman ◽  
...  
Keyword(s):  
Signal Intensity ◽  
Aggressive Fibromatosis ◽  
High Signal Intensity ◽  
High Signal ◽  
T2 Weighted Images

Conservative treatment for pediatric lumbar spondylolysis to achieve bone healing using a hard brace: what type and how long?

2012 ◽  
Vol 16 (6) ◽  
pp. 610-614 ◽  
Author(s):  
Koichi Sairyo ◽  
Toshinori Sakai ◽  
Natsuo Yasui ◽  
Akira Dezawa
Keyword(s):  
Conservative Treatment ◽  
Bone Healing ◽  
Signal Intensity ◽  
Early Stage ◽  
Ct Scanning ◽  
High Signal Intensity ◽  
High Signal ◽  
Mri Findings ◽  
Lumbar Spondylolysis ◽  
Pars Interarticularis

Object Various kinds of trunk braces have been used to achieve bone healing in cases of pediatric lumbar spondylolysis. However, the optimal brace for achieving bone healing is unclear. The purpose of the present study was to determine in what types of spondylolysis bone healing can be achieved and how long it takes. Methods In this prospective study, 63 pars interarticularis defects (spondylolysis) among 37 patients who were younger than 18 years (mean 13.5 ± 2.7 years) were treated using a hard brace. The youngest patient was 8 years old. Based on the results of CT scanning, the lyses were classified into 3 categories: early, progressive, and terminal defects. Progressive defects were further divided into 2 types according to STIR MRI findings: those with high signal intensity at the adjacent pedicle and those with low signal intensity (that is, a normal appearance). A hard brace, such as a molded plastic thoracolumbosacral orthosis, was used to immobilize the trunk. Approximately every 3 months, CT scanning was performed to evaluate bone healing until approximately 6 months. Results The union rates were 94%, 64%, 27%, and 0% for the early, progressive with high signal intensity, progressive with low signal intensity, and terminal defects, respectively. It was noted that no terminal defect was healed using conservative treatment. The mean time to healing among the defects that showed bone healing was 3.2, 5.4, and 5.7 months for the early, progressive with high signal intensity, and progressive with low signal intensity groups, respectively. Conclusions Patients with early-stage defects are the best candidates for conservative treatment with a hard brace because more than 90% of such cases can be healed in 3 months.

scholarly journals Imaging findings of uterine adenosarcoma with sarcomatous overgrowth: two case reports, emphasizing restricted diffusion on diffusion weighted imaging

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Go Nakai ◽  
Hiroki Matsutani ◽  
Takashi Yamada ◽  
Masahide Ohmichi ◽  
Kazuhiro Yamamoto ◽  
...  
Keyword(s):  
Signal Intensity ◽  
Diffusion Weighted Imaging ◽  
High Signal Intensity ◽  
High Signal ◽  
Cervical Canal ◽  
Low Grade ◽  
Imaging Findings ◽  
Mri Findings ◽  
Diffusion Weighted ◽  
Stromal Component

Abstract Background Adenosarcoma is classified as a mixed epithelial and mesenchymal tumor composed of a benign epithelial component and a malignant stromal component. The stromal component in adenosarcoma is usually low grade, and consequently the prognosis is relatively favorable. While, adenosarcoma with sarcomatous overgrowth (SO) is defined as an adenosarcoma in which the sarcomatous component constitutes more than 25% of the tumor. The stromal component is also high-grade sarcoma showing greater nuclear pleomorphism and mitotic activity, thus, it is associated with worse prognosis. MRI findings of adenosarcoma without SO have been described in previous literatures but the imaging findings in adenosarcoma with SO may be poorly defined. Therefore we present two cases of uterine adenosarcoma with SO. Case presentation Patient 1 was a 76-year-old woman referred to our hospital with complaint of abdominal distension and postmenopausal bleeding. Patient 2 was a 57-year-old woman with complaint of lower abdominal pain and abnormal uterine bleeding. On magnetic resonance imaging (MRI), T2 weighted imaging showed a large, heterogeneous high-intensity mass with hyperintense tiny cysts that expanded the uterine cavity and extended into the cervical canal for both patients. On diffusion-weighted imaging (DWI), both masses appeared as high signal intensity. Patient 2 also had a right ovarian adult granulosa cell tumor that may have contributed to development of the adenosarcoma. Patient 1 recurred with peritoneal sarcomatosis 6 months after surgery and died of the disease. Patient 2 also recurred with a left upper lung metastasis 3 months after surgery. Conclusions DWI may depict pathological changes produced by SO of adenosarcoma as high signal intensity, even though SO does not seem to change MRI findings of adenosarcoma on other sequences. Therefore, DWI could potentially predict SO in presumptive adenosarcoma on MRI and the patient’s prognosis. It is also important for pathologists to know if SO can arise in adenosarcoma because they need to examine the tumor thoroughly to determine the percentage of SO component in the tumor volume when SO is present.

Case 14.10

2014 ◽  
pp. 693-694
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Femoral Neck ◽  
Signal Intensity ◽  
High Signal Intensity ◽  
Outer Margin ◽  
High Signal ◽  
The Right ◽  
T2 Weighted Images

52-year-old man with a hereditary disorder Axial fat-suppressed FSE T2-weighted images (Figure 14.10.1) demonstrate multiple exophytic lesions extending from the right and left iliac bones and the right femoral neck. All the lesions have a thin outer margin with high signal intensity. Axial T1-weighted FSE images (...

Case 11.12

2014 ◽  
pp. 549-549
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Pelvic Pain ◽  
Signal Intensity ◽  
Adnexal Mass ◽  
High Signal Intensity ◽  
High Signal ◽  
Weighted Image ◽  
Adnexal Lesion ◽  
T2 Weighted Images

46-year-old woman with pelvic pain and dysuria; pelvic US demonstrated an adnexal mass Axial fat-suppressed FSE T2-weighted images (Figure 11.12.1) demonstrate a large right adnexal lesion with moderately high signal intensity except for a small anterior component. Axial FSE T1-weighted image (...

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