Case 12.19

2014 ◽  
pp. 601-602
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Prostate Carcinoma ◽  
Signal Intensity ◽  
Peripheral Zone ◽  
High Signal Intensity ◽  
High Signal ◽  
Axial Diffusion ◽  
Diffusion Weighted Images ◽  
Endorectal Coil ◽  
Central Gland ◽  
History Of

62-year-old man with a history of prostate carcinoma (Gleason score 3+3) on ultrasound-guided biopsy Axial T2-weighted FRFSE images (Figure 12.19.1) obtained with an endorectal coil demonstrate a hypointense lesion in the left anterior peripheral zone with probable involvement of the central gland. The lesion shows high signal intensity on axial diffusion-weighted images (b=1,000 s/mm...

Case 8.17

2014 ◽  
pp. 403-404
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Signal Intensity ◽  
Bladder Wall ◽  
Prostate Adenocarcinoma ◽  
High Signal Intensity ◽  
High Signal ◽  
Diffusion Weighted Image ◽  
Axial Diffusion ◽  
Weighted Image ◽  
Endorectal Coil ◽  
History Of

68-year-old man with a history of prostatectomy for prostate adenocarcinoma, increasing nocturnal urinary frequency, and rising PSA level Sagittal FSE T2-weighted image (Figure 8.17.1) obtained using an endorectal coil shows a large lobulated mass in the posterior bladder wall extending superiorly to the dome and inferiorly to the vesicourethral junction. The mass has high signal intensity on an axial diffusion-weighted image (b=1,000 s/mm...

Case 11.18

2014 ◽  
pp. 559-560
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Goblet Cell ◽  
Signal Intensity ◽  
Hepatic Metastases ◽  
High Signal Intensity ◽  
High Signal ◽  
Goblet Cell Carcinoid ◽  
Diffusion Weighted Image ◽  
Axial Diffusion ◽  
Weighted Image ◽  
History Of

46-year-old woman with history of appendiceal goblet cell carcinoid, resected 3 years previously, who underwent MRI to assess for hepatic metastases Axial fat-suppressed FSE T2-weighted images (Figure 11.18.1) and sagittal fat-suppressed 2D SSFP image (Figure 11.18.2) reveal a large, mildly heterogeneous mass in the central pelvis superior to the uterus with diffusely high signal intensity and a few scattered cystic components. Axial diffusion-weighted image (b=800 s/mm...

Case 8.16

2014 ◽  
pp. 401-402
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Signal Intensity ◽  
Filling Defect ◽  
Seminal Vesicles ◽  
High Signal Intensity ◽  
High Signal ◽  
Diffusion Weighted Image ◽  
Axial Diffusion ◽  
Weighted Image ◽  
Diffusion Weighted

68-year-old man with hematuria Axial T2-weighted (Figure 8.16.1) and T1-weighted (Figure 8.16.2) FSE images, axial diffusion-weighted image (b=800 s/mm2) (Figure 8.16.3), and sagittal T2-weighted FSE image (Figure 8.16.4) demonstrate marked heterogeneous thickening of the posterior and lateral bladder walls, with high signal intensity on the diffusion-weighted image. The mass has extended posteriorly to invade and encase the seminal vesicles and prostate. Note also a large filling defect present in the bladder lumen, with a hyperintense rim on the T1-weighted image....

scholarly journals Solitary Neurofibroma of the Floor of the Mouth: A Case Report

2011 ◽  
Vol 2011 ◽  
pp. 1-3 ◽  
Author(s):  
Motoyoshi Maruyama ◽  
Hiroaki Fushiki ◽  
Yukio Watanabe
Keyword(s):  
Case Report ◽  
Signal Intensity ◽  
High Signal Intensity ◽  
High Signal ◽  
Submandibular Region ◽  
Weighted Image ◽  
Floor Of The Mouth ◽  
Solitary Neurofibroma ◽  
Cervical Approach ◽  
History Of

We present a case of a solitary neurofibroma of the floor of the mouth protruding into the submandibular region. A 51-year-old female presented with a 2-year history of swelling of the floor of the mouth. MRI revealed that the mass measuring  mm showed a homogenous, low signal intensity on a T1-weighted image and high signal intensity on a T2-weighted image. The tumor was completely removed through a cervical approach. Cases of a solitary neurofibroma originating from the floor of the mouth are extremely rare.

Case 10.19

2014 ◽  
pp. 514-515
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Pelvic Pain ◽  
Signal Intensity ◽  
Axial Diffusion ◽  
Diffusion Weighted Images ◽  
Diffusion Weighted ◽  
History Of

38-year-old woman with a 2-week history of pelvic pain Axial diffusion-weighted images (b=800 s/mm2) (Figure 10.19.1) reveal an infiltrative mass centered in the posterior and right lateral myometrium with heterogeneous increased signal intensity. Sagittal oblique FSE image (Figure 10.19.2...

scholarly journals Intrahepatic cholangiocarcinoma with clear cell type following laparoscopic curative surgery

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Takuya Yamamoto ◽  
Tomoyuki Abe ◽  
Akihiko Oshita ◽  
Shuji Yonehara ◽  
Yoshio Katamura ◽  
...  
Keyword(s):  
Intrahepatic Cholangiocarcinoma ◽  
Signal Intensity ◽  
Clear Cell ◽  
Primary Liver Cancer ◽  
Laparoscopic Hepatectomy ◽  
High Signal Intensity ◽  
High Signal ◽  
Cell Type ◽  
Diffusion Weighted Images ◽  
Clear Cell Type

Abstract Background Intrahepatic cholangiocarcinoma (ICC) is the second most common malignancy of primary liver cancer. Among the several pathological types of ICC, only five cases of the clear cell type have been reported, including the one presented below. Here we report a unique case of clear cell type ICC following laparoscopic hepatectomy. Case presentation A 67-year-old woman had a history of hepatitis B virus. Computed tomography revealed a ring-like enhanced mass 35 mm in diameter at segment 7 in the early phase. The enhancement was prolonged to the late phase through the portal phase, while the shape was irregular. Ethoxybenzy magnetic resonance imaging revealed that the tumor had a low signal intensity on T1-weighted imaging and a high signal intensity on T2-weighted imaging. Diffusion-weighted images identified that the tumor had remarkably high signal intensity. Tumor enhancement was not detected throughout the tumor in the hepatocyte phase. Upon ICC diagnosis, a laparoscopic S7 subsegmentectomy was performed. The patient’s postoperative course was uneventful. An immunohistochemical examination revealed that the cells tested positive for cytokeratin 7 (CK7), CK19, and CD56 and negative for CK20, CD10, α-fetoprotein, thyroid transcription factor-1. At 2 years after surgery, the patient remains alive without recurrence. Conclusions Here we presented a case of clear cell ICC that was treated by laparoscopic hepatectomy. Immunological analysis, especially by CD56 and several CK markers, is helpful for diagnosing this disease.

Case 14.17

2014 ◽  
pp. 707-707
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Signal Intensity ◽  
High Signal Intensity ◽  
High Signal ◽  
History Of ◽  
The Right ◽  
T2 Weighted Images

30-year-old woman with a history of neurofibromatosis and a painful right thigh mass Axial (Figure 14.17.1A) and coronal (Figure 14.17.1B) FSE T1-weighted images and axial (Figure 14.17.2A) and coronal (Figure 14.17.2B) fat-suppressed FSE T2-weighted images reveal a large heterogeneous mass in the right pelvis extending into the groin with high signal intensity on T2-weighted images and regions of low and high signal intensity on T1-weighted images. Axial (...

Case 12.16

2014 ◽  
pp. 594-595
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Physical Examination ◽  
Signal Intensity ◽  
Posterior Margin ◽  
Peripheral Zone ◽  
Endorectal Coil ◽  
Sagittal Image ◽  
Central Gland ◽  
Routine Physical Examination

61-year-old man with an elevated PSA on routine physical examination Axial (Figure 12.16.1) and sagittal (Figure 12.16.2) T2-weighted FRFSE images obtained with an endorectal coil demonstrate marked enlargement of the central gland of the prostate, which contains numerous heterogeneous nodules of variable signal intensity. The peripheral zone is compressed and difficult to visualize on the axial images, but it can be seen as a thin lip of tissue projecting along the posterior margin of the prostate on the sagittal image....

Case 11.2

2014 ◽  
pp. 533-533
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Rectovaginal Fistula ◽  
Signal Intensity ◽  
New Left ◽  
High Signal Intensity ◽  
High Signal ◽  
Lower Quadrant Pain ◽  
Lower Quadrant ◽  
Left Lower Quadrant ◽  
Intensity Lesion ◽  
History Of

31-year-old woman with a history of Crohn colitis and rectovaginal fistula, now presenting with new, left lower quadrant pain Axial fat-suppressed FSE T2-weighted images (Figure 11.2.1) demonstrate a complex high-signal-intensity lesion in the left adnexa. Notice also pelvic ascites and a tubular cystic structure traversing the ascites within the posterior right pelvis. Axial postgadolinium 2D SPGR images (...

scholarly journals Signal Intensity of High B-value Diffusion-weighted Imaging for the Detection of Prostate Cancer

2019 ◽  
Author(s):  
A Rezaeian ◽  
M J Tahmasebi Birgani ◽  
N Chegeni ◽  
M Sarkarian ◽  
M Gh Hanafi ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Cancer Detection ◽  
Signal Intensity ◽  
Peripheral Zone ◽  
B Value ◽  
Diffusion Weighted Images ◽  
High B Value ◽  
Diffusion Weighted ◽  
Central Gland ◽  
Sensitivity Specificity

Background: Diffusion-weighted imaging (DWI) is a main component of multiparametric MRI for prostate cancer detection. Recently, high b value DWI has gained more attention because of its capability for tumor characterization.Objectives: To assess based on histopathological findings of transrectal ultrasound (TRUS)-guided prostate biopsy as a reference, an increase in signal intensity of prostatic lesions in comparison with normal background tissue on high b-value diffusion-weighted images could be a sign of malignancy. Material and Methods: Fifty-three consecutive patients retrospectively included in the study. All patients underwent routine TRUS-guided prostate biopsies involving 12 cores after the magnetic resonance imaging (MRI) examinations. In seventeen patients (n =35 lesions), the prostate cancer was histologically confirmed by TRUS-guided prostate biopsy. The biopsy results of other patients were negative. Signal intensities on the high b-value (1600 s/mm2) images of the peripheral zone, the central gland, and the defined lesions were evaluated using region of interest-based measurements. Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for prostate cancer detection using signal intensity of high b value diffusion-weighted images were calculated.Results: In the patients with confirmed prostate cancer, fourteen had visually increased SI on the high b-value images. The SI of lesions for these patients was higher than the SI of peripheral zone (22±18%) or central gland (31±20%). In patients with a negative biopsy, eight had visually increased SI on the high b-value images. The SI of lesions for these patients was 23±21% and 35±18% higher than the SI in the peripheral zone and the central gland, respectively. The sensitivity, specificity, PPV, and NPV for prostate cancer using SI of high b value DWI were 71, 87, 62, and 87 %, respectively.Conclusions: Visually increased SI on the high b-value images can be an indication of malignancy, although some benign lesions also show this increase in signal intensity. 

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