Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 170
Filtrar
1.
Clin Nucl Med ; 2024 Oct 10.
Artículo en Inglés | MEDLINE | ID: mdl-39385371

RESUMEN

ABSTRACT: Renal artery stenosis can result in renovascular hypertension and ischemic nephropathy. We describe FDG PET/CT and delayed abdominal FDG PET/MRI findings in a kidney associated with severe renal artery stenosis resulting from renal artery invasion in retroperitoneal alveolar echinococcosis. The renal parenchyma showed diffusely increased activity on both FDG PET/CT and delayed FDG PET/MRI. There was no activity in the renal collecting system on FDG PET/CT and focal urine activity in the renal calyces on delayed FDG PET/MRI. This case indicates that renal artery stenosis should be included in the differential diagnosis of diffuse renal parenchymal FDG uptake.

2.
Clin Nucl Med ; 2024 Oct 10.
Artículo en Inglés | MEDLINE | ID: mdl-39385389

RESUMEN

ABSTRACT: Esophageal schwannoma is very rare. We describe FDG PET/CT findings in a case of benign esophageal schwannoma. Endoscopic ultrasound showed the tumor was located in the muscular layer of the esophagus. FDG PET/CT showed intense FDG uptake with SUV max of 10 of the tumor mimicking malignancy. This case indicates that schwannoma should be included in the differential diagnosis of esophageal FDG-avid lesions.

3.
Clin Nucl Med ; 2024 Oct 10.
Artículo en Inglés | MEDLINE | ID: mdl-39388311

RESUMEN

ABSTRACT: We present a case of pancreatic ductal adenocarcinoma showing increased 68Ga-DOTATATE uptake mimicking neuroendocrine tumor on PET/CT. Immunohistochemical analyses of the resected tumor showed the tumor cells were negative for somatostatin receptor subtype 2. The nonneoplastic islets scattered throughout the tumor were positive for somatostatin receptor subtype 2, which may be responsible for the increased 68Ga-DOTATATE uptake. This case indicates that pancreatic ductal adenocarcinoma should be included in the differential diagnosis of the pancreatic lesions showing increased 68Ga-DOTATATE uptake.

4.
Clin Nucl Med ; 2024 Sep 19.
Artículo en Inglés | MEDLINE | ID: mdl-39293180

RESUMEN

ABSTRACT: Anti-MDA5 dermatomyositis is associated with an increased risk of developing rapidly progressive interstitial lung disease with a high mortality. We describe FDG PET/CT findings in a case of rapidly progressive noninfectious interstitial lung disease associated with anti-MDA5 dermatomyositis. The lung disease showed bilateral diffuse ground-glass opacities with diffuse heterogeneous FDG activity predominantly in middle and lower zones, mimicking infectious pneumonia. Familiarity with the imaging features of this rapidly progressive noninfectious interstitial lung disease can help to suggest the diagnosis and guide appropriate management.

5.
Clin Nucl Med ; 49(11): 1070-1072, 2024 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-39192503

RESUMEN

ABSTRACT: Abdominal-wall metastasis following laparoscopic surgery for colorectal cancer is rare. We describe FDG PET/MRI findings in a case of isolated abdominal incisional site metastasis after laparoscopic surgery for colon cancer. The abdominal-wall metastasis showed slight hyperintensity on T2-weighted fat-suppressed image and intense focal FDG uptake on PET. This case demonstrates the usefulness of FDG PET/MRI in detecting the atypical metastasis from colon cancer.


Asunto(s)
Neoplasias del Colon , Fluorodesoxiglucosa F18 , Laparoscopía , Imagen por Resonancia Magnética , Imagen Multimodal , Tomografía de Emisión de Positrones , Humanos , Neoplasias del Colon/diagnóstico por imagen , Neoplasias del Colon/cirugía , Masculino , Neoplasias Abdominales/diagnóstico por imagen , Neoplasias Abdominales/secundario , Neoplasias Abdominales/cirugía , Persona de Mediana Edad , Anciano
6.
Clin Nucl Med ; 2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-39087639

RESUMEN

ABSTRACT: Hepatoid adenocarcinoma of the pancreas is a rare aggressive tumor with poor prognosis. We describe contrast-enhanced CT and FDG PET/CT findings in a case of pancreatic hepatoid adenocarcinoma with significantly elevated α-fetoprotein level presenting as acute pancreatitis. The primary pancreatic tumor diffusely involved the pancreas and showed heterogeneous enhancement mimicking acute necrotizing pancreatitis on contrast-enhanced CT. FDG PET/CT showed intense FDG uptake (SUVmax, 24.5) of the left supraclavicular and retroperitoneal lymph node metastases, suggesting FDG PET/CT may be useful for staging of this aggressive tumor.

7.
Clin Nucl Med ; 49(11): 1048-1049, 2024 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-38968571

RESUMEN

ABSTRACT: Primary urethral urothelial carcinoma is a rare aggressive tumor with a high propensity for local invasion and regional and distal metastases. We describe the usefulness of FDG PET/CT in management of a patient with primary urethral urothelial carcinoma. FDG PET/CT at initial staging showed FDG-avid primary tumor and lymph node metastasis of the left groin, and mild or no activity of the lung metastases due to small size. FDG PET/CT after 4 cycles of chemotherapy showed progression of the primary tumor and lung metastases, partial response of the left inguinal lymphadenopathy, and multiple new sites of FDG-avid metastases.


Asunto(s)
Fluorodesoxiglucosa F18 , Estadificación de Neoplasias , Tomografía Computarizada por Tomografía de Emisión de Positrones , Tomografía Computarizada por Rayos X , Neoplasias Uretrales , Humanos , Neoplasias Uretrales/diagnóstico por imagen , Neoplasias Uretrales/patología , Masculino , Imagen Multimodal , Resultado del Tratamiento , Anciano , Persona de Mediana Edad , Urotelio/patología , Urotelio/diagnóstico por imagen
8.
Clin Nucl Med ; 49(11): 1055-1057, 2024 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-38968579

RESUMEN

ABSTRACT: Bones are the most common sites involved in Erdheim-Chester disease. On imaging, the bone involvement in Erdheim-Chester disease typically presents as osteosclerotic lesions, and osteolytic lesions are unusual. Bone lesions showing no or subtle structure changes are rarely reported. We describe FDG PET/CT findings in a case of Erdheim-Chester disease with atypical bone involvement. The bone lesions showed no or subtle structure changes without obvious osteosclerosis or osteolysis on radiographs and CT, and increased FDG activity mimicking lymphoma. Familiarity with these atypical imaging findings of bone involvement in Erdheim-Chester disease is helpful for the diagnosis.


Asunto(s)
Huesos , Enfermedad de Erdheim-Chester , Fluorodesoxiglucosa F18 , Tomografía Computarizada por Tomografía de Emisión de Positrones , Humanos , Enfermedad de Erdheim-Chester/diagnóstico por imagen , Huesos/diagnóstico por imagen , Huesos/patología , Masculino , Persona de Mediana Edad , Femenino , Tomografía Computarizada por Rayos X
9.
Clin Nucl Med ; 49(10): 978-980, 2024 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-38968570

RESUMEN

ABSTRACT: We describe contrast-enhanced CT and FDG PET/CT findings in a case of thoracic SMARCA4-deficient undifferentiated tumor with extensive pleural involvement and mediastinal lymph node metastases. Contrast-enhanced CT showed multiple enhancing right-sided pleural masses and soft tissue plaques and enlarged mediastinal lymph nodes. The pleural lesions and mediastinal lymph nodes showed intense FDG uptake mimicking malignant pleural mesothelioma with mediastinal lymph node metastases.


Asunto(s)
ADN Helicasas , Fluorodesoxiglucosa F18 , Mesotelioma Maligno , Mesotelioma , Neoplasias Pleurales , Tomografía Computarizada por Tomografía de Emisión de Positrones , Factores de Transcripción , Humanos , Diagnóstico Diferencial , Mesotelioma Maligno/diagnóstico por imagen , Mesotelioma/diagnóstico por imagen , Factores de Transcripción/genética , Neoplasias Pleurales/diagnóstico por imagen , ADN Helicasas/genética , Proteínas Nucleares/genética , Proteínas Nucleares/deficiencia , Proteínas Nucleares/metabolismo , Masculino , Neoplasias Pulmonares/diagnóstico por imagen , Imagen Multimodal , Tomografía Computarizada por Rayos X , Neoplasias Torácicas/diagnóstico por imagen , Persona de Mediana Edad
10.
Clin Nucl Med ; 49(10): 981-983, 2024 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-38861423

RESUMEN

ABSTRACT: Hematogenous or lymphatic intraureteral metastasis from distant primary cancer is very rare. We present contrast-enhanced CT and FDG PET/CT findings in a case of intraureteral metastasis from colonic adenocarcinoma 3 years after colectomy. The intraureteral showed moderate enhancement on contrast-enhanced CT and increased FDG uptake on PET/CT mimicking a primary ureteral carcinoma. This case suggests that metastatic tumor of the ureter should be considered in the differential diagnosis in patients with hypermetabolic ureteral lesion and known malignancy.


Asunto(s)
Neoplasias del Colon , Fluorodesoxiglucosa F18 , Tomografía Computarizada por Tomografía de Emisión de Positrones , Neoplasias Ureterales , Humanos , Neoplasias del Colon/diagnóstico por imagen , Neoplasias del Colon/patología , Diagnóstico Diferencial , Fluorodesoxiglucosa F18/administración & dosificación , Imagen Multimodal , Tomografía Computarizada por Tomografía de Emisión de Positrones/métodos , Tomografía Computarizada por Rayos X , Neoplasias Ureterales/diagnóstico por imagen , Neoplasias Ureterales/secundario
11.
Clin Nucl Med ; 49(8): 757-760, 2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-38861415

RESUMEN

ABSTRACT: Primary skeletal muscle lymphoma is rare. We describe 18 F-FAPI-42 and 18 F-FDG PET/MRI findings in a case of primary peripheral T-cell lymphoma of the skeletal muscles with brain involvement. The multiple skeletal muscle tumors and one larger cerebral tumor showed intense FDG uptake and mild to moderate FAPI uptake. FDG PET was superior to FAPI PET in delineating the muscle tumors because of significantly higher FDG uptake of the muscle tumors than FAPI uptake. FAPI PET was superior to FDG PET in delineating the cerebral lesion because of a very low background FAPI activity in the brain parenchyma.


Asunto(s)
Fluorodesoxiglucosa F18 , Linfoma de Células T Periférico , Imagen por Resonancia Magnética , Músculo Esquelético , Tomografía de Emisión de Positrones , Humanos , Linfoma de Células T Periférico/diagnóstico por imagen , Músculo Esquelético/diagnóstico por imagen , Masculino , Imagen Multimodal , Neoplasias de los Músculos/diagnóstico por imagen , Persona de Mediana Edad
12.
Clin Nucl Med ; 49(7): 693-694, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38775942

RESUMEN

ABSTRACT: A 23-year-old woman presenting with gross hematuria was found to have a left renal mass suspicious for renal cell carcinoma on abdominal contrast-enhanced CT. An 18 F-PSMA-1007 PET/CT scan was performed for evaluating the renal mass. 18 F-PSMA-1007 PET/CT showed focal activity of the renal mass, which was a transcription factor E3-rearranged renal cell carcinoma proved after nephrectomy. Surprisingly, diffuse heterogeneous intense activity of the bilateral breasts and moderate activity of the right accessory breast was observed. There was no morphological abnormality of the bilateral breasts and right accessory breast on CT images, indicating physiological PSMA uptake.


Asunto(s)
Factores de Transcripción Básicos con Cremalleras de Leucinas y Motivos Hélice-Asa-Hélice , Mama , Carcinoma de Células Renales , Neoplasias Renales , Tomografía Computarizada por Tomografía de Emisión de Positrones , Humanos , Femenino , Neoplasias Renales/diagnóstico por imagen , Neoplasias Renales/metabolismo , Mama/diagnóstico por imagen , Carcinoma de Células Renales/diagnóstico por imagen , Carcinoma de Células Renales/genética , Carcinoma de Células Renales/metabolismo , Adulto Joven , Factores de Transcripción Básicos con Cremalleras de Leucinas y Motivos Hélice-Asa-Hélice/metabolismo , Factores de Transcripción Básicos con Cremalleras de Leucinas y Motivos Hélice-Asa-Hélice/genética , Oligopéptidos , Reordenamiento Génico , Compuestos Heterocíclicos con 1 Anillo , Niacinamida/análogos & derivados
13.
Clin Nucl Med ; 49(6): e288-e289, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38704655

RESUMEN

ABSTRACT: Solitary mixed squamous cell and glandular papilloma of the lung is an extremely rare benign neoplasm. We describe FDG PET/CT findings in a case of solitary mixed squamous cell and glandular papilloma of the lung with high serum carcinoembryonic antigen level (63.3 ng/mL; reference, <5 ng/mL). The tumor showed intense FDG uptake with SUVmax of 23.8 mimicking lung cancer.


Asunto(s)
Antígeno Carcinoembrionario , Fluorodesoxiglucosa F18 , Neoplasias Pulmonares , Papiloma , Tomografía Computarizada por Tomografía de Emisión de Positrones , Humanos , Antígeno Carcinoembrionario/sangre , Neoplasias Pulmonares/diagnóstico por imagen , Neoplasias Pulmonares/patología , Papiloma/diagnóstico por imagen , Tomografía Computarizada por Rayos X
14.
Clin Nucl Med ; 49(7): 698-700, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38739485

RESUMEN

ABSTRACT: Choriocarcinomas usually occur in the genital tracts of reproductive-age women after a gestational event. Primary pulmonary choriocarcinoma is very rare. We describe FDG PET/CT findings of primary pulmonary choriocarcinoma with multiple intrapulmonary metastases in a postmenopausal woman with elevated serum beta human chorionic gonadotropin level. On FDG PET/CT, the large primary lung tumor showed intense FDG uptake (SUV max , 46), and the small intrapulmonary metastases showed variable FDG uptake (SUV max , 27). Primary pulmonary choriocarcinoma should be included in the differential diagnosis of FDG-avid pulmonary lesions with elevated serum beta human chorionic gonadotropin levels, including metastatic choriocarcinoma and lung cancer.


Asunto(s)
Coriocarcinoma , Fluorodesoxiglucosa F18 , Neoplasias Pulmonares , Imagen Multimodal , Tomografía Computarizada por Tomografía de Emisión de Positrones , Posmenopausia , Tomografía Computarizada por Rayos X , Humanos , Femenino , Neoplasias Pulmonares/diagnóstico por imagen , Coriocarcinoma/diagnóstico por imagen , Coriocarcinoma/patología , Persona de Mediana Edad , Tomografía de Emisión de Positrones
15.
Clin Nucl Med ; 49(7): 685-687, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38598478

RESUMEN

ABSTRACT: Inflammatory variant of well-differentiated liposarcoma is a rare subtype of liposarcoma, and its imaging features have been rarely reported. We describe FDG PET/CT findings in a case of well-differentiated inflammatory liposarcoma. The tumor showed no detectable fat and intense FDG uptake and caused diffuse FDG uptake of the bone marrow due to paraneoplastic leukemoid reaction. Microscopically, there were extensive inflammatory infiltrates in the tumor, which may contribute to the intense FDG uptake. This case indicates that although well-differentiated liposarcoma usually shows low-grade FDG uptake, inflammatory variant of well-differentiated liposarcoma can show intense FDG uptake mimicking high-grade liposarcoma.


Asunto(s)
Fluorodesoxiglucosa F18 , Liposarcoma , Tomografía Computarizada por Tomografía de Emisión de Positrones , Neoplasias Retroperitoneales , Humanos , Liposarcoma/diagnóstico por imagen , Liposarcoma/patología , Neoplasias Retroperitoneales/diagnóstico por imagen , Neoplasias Retroperitoneales/patología , Masculino , Inflamación/diagnóstico por imagen , Transporte Biológico , Persona de Mediana Edad , Tomografía Computarizada por Rayos X
16.
Clin Nucl Med ; 49(7): 677-679, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38598494

RESUMEN

ABSTRACT: Juxtaglomerular cell tumor or reninoma is an extremely rare, typically benign, renin-secreting tumor of the kidney that causes secondary hypertension. We describe 99m Tc-MIBI SPECT/CT findings in a case of juxtaglomerular cell tumor. The renal tumor showed isodensity and photopenia on 99m Tc-MIBI SPECT/CT. This case indicates that juxtaglomerular cell tumor can appear cold on 99m Tc-MIBI SPECT/CT, mimicking renal cell carcinoma.


Asunto(s)
Carcinoma de Células Renales , Aparato Yuxtaglomerular , Neoplasias Renales , Tomografía Computarizada por Tomografía Computarizada de Emisión de Fotón Único , Tecnecio Tc 99m Sestamibi , Humanos , Carcinoma de Células Renales/diagnóstico por imagen , Neoplasias Renales/diagnóstico por imagen , Diagnóstico Diferencial , Aparato Yuxtaglomerular/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Femenino
17.
Clin Nucl Med ; 49(6): 594-596, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38537218

RESUMEN

ABSTRACT: Solitary fibrous tumor arising from the seminal vesicle is very rare. We describe 18 F-PSMA-1007 PET/CT findings in a case of prostate adenocarcinoma with a solitary fibrous tumor of the left seminal vesicle. The solitary fibrous tumor showed intense 18 F-PSMA-1007 uptake mimicking metastatic prostate adenocarcinoma. This case indicates that solitary fibrous tumor may cause false-positive result when using PSMA PET in staging of prostate cancer.


Asunto(s)
Niacinamida/análogos & derivados , Tomografía Computarizada por Tomografía de Emisión de Positrones , Vesículas Seminales , Tumores Fibrosos Solitarios , Humanos , Masculino , Vesículas Seminales/diagnóstico por imagen , Vesículas Seminales/patología , Tumores Fibrosos Solitarios/diagnóstico por imagen , Tumores Fibrosos Solitarios/metabolismo , Anciano , Tomografía Computarizada por Rayos X , Transporte Biológico , Neoplasias de la Próstata/diagnóstico por imagen , Neoplasias de la Próstata/metabolismo , Neoplasias de la Próstata/patología , Oligopéptidos
18.
Clin Nucl Med ; 49(6): e304-e306, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38377381

RESUMEN

ABSTRACT: A 64-year-old man was referred for 18 F-PSMA-1007 PET/CT scan for initial staging of biopsy-proved prostate adenocarcinoma. 18 F-PSMA-1007 PET/CT showed focal intense 18 F-PSMA-1007 of the prostate adenocarcinoma and a focal intense activity with SUV max of 10.5 in the left ilium. The 18 F-PSMA-1007-avid iliac bone lesion corresponded to a hemangioma, which was initially detected on pelvic MRI 13 months ago and remained stable in size. This case indicates that hemangioma should be included in the differential diagnosis of PSMA-avid iliac bone lesions.


Asunto(s)
Neoplasias Óseas , Hemangioma , Ilion , Niacinamida/análogos & derivados , Tomografía Computarizada por Tomografía de Emisión de Positrones , Humanos , Masculino , Persona de Mediana Edad , Neoplasias Óseas/diagnóstico por imagen , Neoplasias Óseas/secundario , Ilion/diagnóstico por imagen , Ilion/patología , Diagnóstico Diferencial , Hemangioma/diagnóstico por imagen , Oligopéptidos , Tomografía Computarizada por Rayos X , Imagen Multimodal
19.
Clin Nucl Med ; 49(4): 377-378, 2024 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-38377374

RESUMEN

ABSTRACT: Hematogenous gastric metastasis from pancreatic cancer is extremely rare. We describe FDG PET/CT findings in a case of isolated hematogenous gastric metastasis from pancreatic cancer with significantly elevated serum carbohydrate antigen 19-9 level. The gastric metastasis showed intense focal FDG uptake mimicking a primary tumor. The elevation of serum carbohydrate antigen 19-9 level may be useful as an aid in the differential diagnosis.


Asunto(s)
Carcinoma Ductal Pancreático , Neoplasias Pancreáticas , Humanos , Fluorodesoxiglucosa F18 , Tomografía Computarizada por Tomografía de Emisión de Positrones , Neoplasias Pancreáticas/diagnóstico por imagen , Estómago
20.
Clin Nucl Med ; 49(7): e331-e333, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38271238

RESUMEN

ABSTRACT: Primary plasmacytoma of the stomach is very rare. We describe contrast-enhanced CT and 18 F-FAPI-04 PET/CT findings in a patient with primary gastric plasmacytoma and Helicobacter pylori infection. The gastric tumor appeared as a large hypervascular polypoid mass on contrast-enhanced CT and showed intense 18 F-FAPI-04 uptake with SUV max of 11.8 on 18 F-FAPI-04 PET/CT.


Asunto(s)
Plasmacitoma , Tomografía Computarizada por Tomografía de Emisión de Positrones , Neoplasias Gástricas , Humanos , Plasmacitoma/diagnóstico por imagen , Neoplasias Gástricas/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Tomografía Computarizada por Rayos X
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...