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All Journal Indonesian Journal of Cancer International Journal of Radiology and Imaging
Hama, Yukihiro
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Biochemistry, Genetics & Molecular Biology Computer Science & IT Dentistry Immunology & microbiology Medicine & Pharmacology Neuroscience Public Health

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Megavoltage CT/MRI-Guided Radiotherapy with Endorectal Balloon Support for Prostate Cancer Patient with Bilateral Hip Prostheses Hama, Yukihiro; Tate, Etsuko
Indonesian Journal of Cancer Vol 18, No 2 (2024): June
Publisher : http://dharmais.co.id/

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33371/ijoc.v18i2.1203

Abstract

Introduction: Kilovoltage CT-guided radiotherapy for prostate cancer patients with bilateral hip prostheses can be challenging due to metal artifacts. Case Presentation: To compensate for reduced tissue contrast and suppress metal artifacts, a 76-year-old NCCN very high-risk prostate cancer patient underwent megavoltage CT/MRI fusion image-guided radiotherapy with an endorectal balloon. The post-treatment course was uneventful. There were no recurrences or serious side effects 11 years after radiotherapy. Conclusions: Megavoltage CT/MRI-guided radiotherapy with endorectal balloon support may be a viable alternative for a prostate cancer patient with bilateral hip prostheses.
Ureteral Carcinoma Complicated by Xanthogranulomatous Pyelonephritis and Ureteritis Cystica Hama, Yukihiro; Tate, Etsuko
International Journal of Radiology and Imaging Vol. 3 No. 02 (2024): International Journal of Radiology and Imaging
Publisher : Department of Radiology, Medical Faculty, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.ijri.2024.003.02.4

Abstract

Introduction: Both xanthogranulomatous pyelonephritis (XP) and ureteritis cystica (UC) are rare diseases, and no case of coexistence with ureteral urothelial carcinoma has ever been reported. The purpose of this article is to present a case of ureteral urothelial carcinoma complicated by XP and UC and to discuss the CT and MRI findings. Case presentation: A 72-year-old woman with a history of diabetes mellitus, recurrent urinary tract infections, and bladder cancer was referred for evaluation of multiple ureteral and renal masses on the left side. No urinary tract stones were found on CT. The tumor in the lower ureter was hyperintense on diffusion-weighted image (DWI), and the tumor in the middle ureter was hypointense on DWI, showing polycystic wall thickening. DWI of the kidney showed multiple hyperintense lesions within the kidney. Pathological examination revealed tumors in the lower ureter, middle ureter, and left kidney as urothelial carcinoma, UC, and XP, respectively. Conclusion: In a patient with a history of diabetes mellitus and recurrent urinary tract infections, XP and UC should be considered in the differential diagnosis of urothelial carcinoma. Keywords: Urothelial Carcinoma, Renal Tumors, Ureteral Neoplasms, Magnetic Resonance Imaging
Primary Mucosa-Associated Lymphoid Tissue (MALT) Lymphoma of the Prostate: MRI and FDG-PET Imaging Findings Hama, Yukihiro
International Journal of Radiology and Imaging Vol. 2 No. 02 (2023): International Journal of Radiology and Imaging
Publisher : Department of Radiology, Medical Faculty, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776//ub.ijri.2023.002.02.2

Abstract

Background: Primary mucosa-associated lymphoid tissue (MALT) lymphoma of the prostate is a rare condition, and there is no report on magnetic resonance imaging (MRI) and its relationship with fluorine-18 fluorodeoxyglucose positron emission tomography (FDG-PET). Objectives: The purpose of this article is to present the MRI and FDG-PET imaging findings of primary MALT lymphoma of the prostate and discuss the imaging findings’ importance in the diagnosis and management. Case summaries: A 73-year-old male patient underwent a prostate biopsy for lower urinary tract symptoms and an elevated serum prostate-specific antigen level. Histopathologic and immunohistochemical findings were consistent with MALT lymphoma. As the tumor was confined to the prostate and adjacent tissues and no lymph node metastases were detected on PET-CT, the diagnosis was primary MALT lymphoma of the prostate. The tumor of the transitional zone infiltrated along the obturator internus muscle and into the pubic bone, the levator ani muscle was almost intact on MRI. Conclusion: The absence of lymph node metastasis or gross muscle destruction but a high degree of invasiveness into surrounding tissues is an important imaging finding in the diagnosis of primary MALT lymphoma of the prostate. Keywords: Differential Diagnosis; MRI; Prostate Neoplasms
Pseudoprogression After Adaptive Radiation Therapy For Early-Stage Non-Small Cell Lung Cancer: Case Report Hama, Yukihiro
International Journal of Radiology and Imaging Vol. 3 No. 01 (2024): International Journal of Radiology and Imaging
Publisher : Department of Radiology, Medical Faculty, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776//ub.ijri.2024.003.01.2

Abstract

Background: Differentiating local recurrence from pseudoprogression after radiotherapy for early-stage non-small cell lung cancer (NSCLC) can be challenging. Adaptive radiation therapy (ART) is an innovative radiotherapy technique that adjusts the radiation dose and treatment plan to ensure the tumor receives the optimal radiation while minimizing exposure to the surrounding healthy tissue. To our knowledge, there is no report of pseudoprogression in a patient with NSCLC who received ART. Objectives: The purpose of this article is to present the CT and 18-fluorodeoxyglucose (18F-FDG) positron emission tomography (PET) imaging findings of pseudoprogression after ART and discuss the imaging findings important for diagnosis and management. Case summaries: An 87-year-old woman with early-stage NSCLC underwent ART, receiving a total dose of 74 Gy administered in 37 fractions. The maximum standard uptake value (SUVmax) of 18F-FDG in the tumor increased from 2.5 before ART to 3.7 six months after ART on PET, suggesting local recurrence. However, the SUVmax decreased to 2.2 one year after ART, and on CT, the tumor size decreased consistently after ART. Based on serial CT and PET imaging findings, the temporal uptake of 18F-FDG at 6 months after ART was diagnosed as pseudoprogression. Conclusion: Serial CT and PET imaging findings may help differentiate local recurrence from pseudoprogression when tumor size decreases on CT but 18F-FDG uptake increases on PET. Keywords: Differential Diagnosis; Lung Neoplasms; Adaptive Radiation Therapy, Positron-emission Tomography
Presacral Schwannoma Resembling Lymph Node Metastasis in a Patient with Locally Advanced Prostate Cancer Hama, Yukihiro; Tate, Etsuko
Indonesian Journal of Cancer Vol 18, No 1 (2024): March
Publisher : http://dharmais.co.id/

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33371/ijoc.v18i1.1096

Abstract

Introduction: SSchwannomas originating in the pelvic region are rare and present diagnostic challenges when they coexist with malignancies. Case Presentation: A 58-year-old man with urinary frequency and an elevated prostate-specific antigen level underwent preoperative imaging. T2-weighted magnetic resonance imaging (MRI) of the prostate identified an irregular hypointense lesion with extracapsular invasion, as well as a presacral nodule resembling lymph node metastasis. The presacral nodule exhibited an intermediate signal intensity on the apparent diffusion coefficient map that was derived from diffusion-weighted images. Dynamic contrast-enhanced MRI revealed persistent enhancement in the presacral node, while the prostate tumor exhibited strong early enhancement followed by washout. Pathological and laparoscopic findings confirmed the coexistence of locally advanced prostate cancer and pelvic schwannoma. Conclusions: MRI is useful not only in detecting prostate cancer but also in differentiating lymph node metastases from schwannoma.
Co-Authors Tate, Etsuko