RESUMO
ABSTRACT: Neurothekeoma is a very rare cutaneous lesion affecting mainly young patients. The lesion is generally benign. We report here that intense FDG activity on PET/CT was noted at the site of primary neurothekeoma of the right shoulder in a 16-year-old boy. Abnormal FDG activity was also seen in the metastatic neurothekeoma in the lung in the same patient 2 years later.
Assuntos
Fluordesoxiglucose F18 , Neurotecoma , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Humanos , Masculino , Adolescente , Neurotecoma/diagnóstico por imagem , Neurotecoma/metabolismo , Tomografia Computadorizada por Raios X , Imagem MultimodalRESUMO
ABSTRACT: Ewing sarcoma is the second most common osseous malignancy in pediatric patient. Metastasis is common due to its aggressive nature, with 25% of patients with metastasis at diagnosis, commonly to the lungs, bone, or bone marrow. Muscle metastasis is uncommon. We report FDG PET/CT findings of multifocal muscle metastases of recurrent Ewing sarcoma in the extremities without lung and bone involvement in a 6-year-old boy.
Assuntos
Fluordesoxiglucose F18 , Neoplasias Musculares , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Sarcoma de Ewing , Tomografia Computadorizada por Raios X , Humanos , Sarcoma de Ewing/diagnóstico por imagem , Sarcoma de Ewing/patologia , Masculino , Criança , Neoplasias Musculares/diagnóstico por imagem , Neoplasias Musculares/secundário , Extremidades/diagnóstico por imagem , Recidiva , Imagem Multimodal , Neoplasias Ósseas/diagnóstico por imagem , Neoplasias Ósseas/secundárioRESUMO
ABSTRACT: Majority of primary pediatric neuroblastomas occur in the abdomen, followed by posterior mediastinum. A 7-year-old girl presented worsening pain in the left shoulder, and a CT image of the chest revealed osseous destruction in the left scapula, suggestive of bone tumor. A biopsy was performed. Pathological result was consistent with neuroblastoma. A 123I scan with SPECT/CT images was performed, which showed only increased activity in the left scapula without any other foci of abnormal activity elsewhere.
Assuntos
Neoplasias Ósseas , Neuroblastoma , Feminino , Criança , Humanos , Tomografia Computadorizada com Tomografia Computadorizada de Emissão de Fóton Único , Neoplasias Ósseas/diagnóstico por imagem , Neoplasias Ósseas/patologia , Cintilografia , Escápula/diagnóstico por imagem , Neuroblastoma/diagnóstico por imagem , Neuroblastoma/patologiaRESUMO
ABSTRACT: A 12-year-old girl presented with a history of kidney transplant complicated by posttransplant lymphoproliferative disease. A solid mass was found in the lower pole of the transplanted kidney, concerning for posttransplant lymphoproliferative disease. However, biopsy confirmed papillary renal cell carcinoma. FDG PET/CT showed increased activity in the known renal cell carcinoma in the renal allograft.
Assuntos
Carcinoma de Células Renais , Neoplasias Renais , Transplante de Rim , Transtornos Linfoproliferativos , Feminino , Humanos , Criança , Carcinoma de Células Renais/complicações , Transplante de Rim/efeitos adversos , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada/efeitos adversos , Fluordesoxiglucose F18 , Rim , Neoplasias Renais/complicações , Transtornos Linfoproliferativos/etiologiaRESUMO
Rosai-Dorfman disease is typically presented as lymphadenopathy, especially in the neck. Extranodal diseases also frequently occur but are generally concurrent with nodal disease. We report FDG PET/CT findings of solitary femoral Rosai-Dorfman disease without any lymphadenopathy in a pediatric patient.
Assuntos
Histiocitose Sinusal/diagnóstico por imagem , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Criança , Fluordesoxiglucose F18 , Humanos , Masculino , Compostos RadiofarmacêuticosRESUMO
Primary penile malignancy is uncommon. Congenital primary penile rhabdomyosarcoma diagnosed in an infant is extremely rare. We present the FDG PET/CT findings in a 1-month-old boy with penile mass. The images showed hypermetabolic lesion at the base of the penis and left inguinal lymph node. Pathological examination demonstrated rhabdomyosarcoma.
Assuntos
Neoplasias Penianas/diagnóstico por imagem , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Rabdomiossarcoma/diagnóstico por imagem , Fluordesoxiglucose F18 , Humanos , Lactente , Masculino , Neoplasias Penianas/congênito , Compostos Radiofarmacêuticos , Rabdomiossarcoma/congênitoRESUMO
Brain metastasis from papillary thyroid carcinoma is uncommon. Concurrent cerebral and pulmonary metastases from papillary thyroid carcinoma is rare, especially in pediatric patients. We report a case of a brain metastasis revealed on post-therapy I scan in a 12 year old girl with thyroid cancer who also had diffuse pulmonary metastases which were partially responsive to sequential I therapy.
Assuntos
Neoplasias Encefálicas/diagnóstico por imagem , Carcinoma Papilar/patologia , Neoplasias da Glândula Tireoide/patologia , Neoplasias Encefálicas/secundário , Carcinoma Papilar/diagnóstico por imagem , Criança , Feminino , Humanos , Câncer Papilífero da Tireoide , Neoplasias da Glândula Tireoide/diagnóstico por imagemRESUMO
A series of I-MIBG scanning was performed in a 33-year-old woman with a history of ganglioneuroblastoma and a known left renal cyst. The initial studies did not reveal any MIBG activity in the renal cyst. However, increased MIBG activity was noted in the same renal cyst in the subsequent follow-up scans.
Assuntos
3-Iodobenzilguanidina , Cistos/diagnóstico por imagem , Neoplasias Renais/diagnóstico por imagem , Adulto , Cistos/complicações , Feminino , Ganglioneuroblastoma/complicações , Humanos , Neoplasias Renais/complicaçõesRESUMO
Elevated activity in the lung field on gastroesophageal scintigraphy (milk scan) generally indicates aspiration of the gastric content that has refluxed to the pharynx. An 18-year-old man underwent to gastroesophageal scintigraphy to assess the rate of gastric emptying. Increased activity was noted in the left lower lung field during the image acquisition. Careful analysis of the images showed that this activity was caused by hiatal herniation.
Assuntos
Esôfago/diagnóstico por imagem , Interpretação de Imagem Assistida por Computador , Pulmão/diagnóstico por imagem , Cintilografia , Estômago/diagnóstico por imagem , Adolescente , Esvaziamento Gástrico , Hérnia Hiatal/diagnóstico por imagem , Hérnia Hiatal/fisiopatologia , Humanos , MasculinoRESUMO
An 123I-MIBG scan was obtained to evaluate a right adrenal mass in a 10-year-old boy, which showed no elevated activity in the lesion. However, diffuse increased activity was noted in the right forearm with typical manifestation of an "arterial injection." Different from a prior case report, no symptoms or signs related to arterial injection were observed in our patient.