Tumor miofibroblástico de maxilar superior. Estadificación inicial y evaluación de la respuesta al tratamiento con PET/TC con 18F-FDG / Upper maxilla myofibroblastic tumour. Initial staging and treatment response evaluation with 18F-FDG PET/CT

No disponible

PET/TC con 18F-FDG en la recaída extramedular de una leucemia aguda de linaje ambiguo / 18F-FDG PET/CT for extramedullary relapse of acute leukemia of ambiguous lineage

No disponible

Carcinoma escamoso de úvula concomitante a carcinoma esofágico en estudio PET/TC con 18F-FDG / Uvular squamous cell carcinoma concomitant with oesophageal carcinoma in a 18F-FDG PET/CT study

No disponible

PET/TC con 18F-FDG «superscan» en paciente con linfoma inmunoblástico / 18F-FDG PET/CT «superscan» in a patient with immunoblastic lymphoma

No disponible

Biopsia selectiva de ganglio centinela en carcinomas de mama N+ convertidos a N0 después de quimioterapia neoadyuvante / Sentinel lymph node biopsy in N+ breast cancer with conversion into N0 after neoadjuvant chemotherapy

OBJETIVO: Valorar la utilidad de la biopsia selectiva del ganglio centinela (BSGC) en pacientes con carcinoma de mama N+ convertidas a N0 tras recibir quimioterapia neoadyuvante. MATERIAL Y MÉTODOS: Análisis descriptivo incluyendo 16 mujeres diagnosticadas de carcinoma infiltrante de mama con metástasis linfáticas confirmadas por biopsia y portadoras de marcador metálico (MM) en el ganglio patológico. Recibieron quimioterapia neoadyuvante con respuesta radiológica completa ganglionar. Se realizó linfogammagrafía tras inyección 99mTc-nanocoloides, obteniéndose imágenes planares y SPECT/TC, analizando el drenaje linfático y la concordancia del ganglio centinela (GC) con el MM. RESULTADOS: El GC se visualizó en la linfogammagrafía en el 93,7% de los casos. El GC coincidió con el MM en 12/15 en la SPECT/TC. Se completó la técnica de BSGC en 14/16, localizando intraoperatoriamente el GC en todas ellas. El GC fue negativo en 10 pacientes, 3 presentaron macrometástasis y una micrometástasis, realizándose linfadenectomía axilar a los casos con macrometástasis>15.000cp/μARNm CK-19, ausencia de drenaje y uno de los no coincidentes con el MM por encontrarse en diferentes niveles de Berg. Estos 2 últimos con resultado positivo para metástasis. En los otros casos de no coincidencia con el MM se extirparon en total 4 ganglios linfáticos, sin evidencia de metástasis. A las pacientes que no se les practicó linfadenectomía axilar se les hizo seguimiento medio de 10 meses (rango 6-17), sin evidencia de afectación ganglionar. CONCLUSIONES: La BSGC en el cáncer de mama con conversión a N0 post-neoadyuvancia presenta buenos resultados y una baja tasa de falsos negativos

OBJECTIVE: Sentinel lymph node biopsy (SLNB) usefulness in breast carcinoma N+ converted to N0 after neoadjuvant chemotherapy (NC). MATERIAL AND METHODS: Descriptive study including 16 females with infiltrating carcinoma with lymphatic metastasis confirmed by biopsy, leaving a metallic marker (MM) in pathological lymph nodes (LN). All patients underwent NC reaching a complete radiological response in LN. Lymphoscintigraphy was performed after 99mTc nanocoloid injection, obtaining planar images and SPECT/CT. Lymphatic drainage and concordance of sentinel node (SN) with MM was analyzed. RESULTS: SN was visualized in lymphoscintigraphy in 93.7% of cases. The SN coincided with the MM in 12/15 cases on SPECT/CT. The SLNB technique was completed on 14/16 patients, intraoperatively locating the GC in all of them. The SN was negative in 10 cases, 3 cases presented macrometastases and 1 micrometastases. Axillary lymphadenectomy (AL) was performed in a case of macrometastasis with>15,000cp/μARNm CK-19, absence of drainage and in one case that showed no coincidence with the MM due different Berg′s level location. These last two cases presented lymph node metastasis. In the other two cases with not coincidence between the SN and the MM, a total of 4 lymph nodes were removed, showing no evidence of metastasis. Patients without AL were followed up for an average of 10 months (range 6-17), with no evidence of lymph node involvement. CONCLUSION: SLNB in breast cancer with conversion into N0 after neoadjuvant treatment is a technique with good results and a low false negative rate

Sentinel lymph node biopsy in N+ breast cancer with conversion into N0 after neoadjuvant chemotherapy. / Biopsia selectiva de ganglio centinela en carcinomas de mama N+ convertidos a N0 después de quimioterapia neoadyuvante.

OBJECTIVE: Sentinel lymph node biopsy (SLNB) usefulness in breast carcinoma N+ converted to N0 after neoadjuvant chemotherapy (NC). MATERIAL AND METHODS: Descriptive study including 16 females with infiltrating carcinoma with lymphatic metastasis confirmed by biopsy, leaving a metallic marker (MM) in pathological lymph nodes (LN). All patients underwent NC reaching a complete radiological response in LN. Lymphoscintigraphy was performed after 99mTc nanocoloid injection, obtaining planar images and SPECT/CT. Lymphatic drainage and concordance of sentinel node (SN) with MM was analyzed. RESULTS: SN was visualized in lymphoscintigraphy in 93.7% of cases. The SN coincided with the MM in 12/15 cases on SPECT/CT. The SLNB technique was completed on 14/16 patients, intraoperatively locating the GC in all of them. The SN was negative in 10 cases, 3 cases presented macrometastases and 1 micrometastases. Axillary lymphadenectomy (AL) was performed in a case of macrometastasis with>15,000cp/µARNm CK-19, absence of drainage and in one case that showed no coincidence with the MM due different Berg's level location. These last two cases presented lymph node metastasis. In the other two cases with not coincidence between the SN and the MM, a total of 4 lymph nodes were removed, showing no evidence of metastasis. Patients without AL were followed up for an average of 10 months (range 6-17), with no evidence of lymph node involvement. CONCLUSION: SLNB in breast cancer with conversion into N0 after neoadjuvant treatment is a technique with good results and a low false negative rate.

Utilidad de la 18F-FDG PET/TC en un caso de sospecha de infección de injerto vascular / Usefulness of 18F-FDG PET/CT in a case of suspected vascular graft infection

La infección del injerto vascular protésico (VPGI) se asocia a una gran morbimortalidad. Es esencial un diagnóstico precoz y preciso para llevar a cabo el tratamiento más adecuado. Presentamos el caso de un varón de 74 años intervenido de by-pass aorto-bifemoral con sospecha clínica de infección de la prótesis vascular y pruebas complementarias no concluyentes, en el que se realiza un estudio PET/TC con 18F-FDG que muestra una captación patológica a nivel periprotésico sugestiva de infección, así como lesión incidental pulmonar sugestiva de neoplasia primaria. Una 18F-FDG PET/TC de control tras tratamiento antibiótico prolongado demostró una mejoría significativa en la captación en el injerto vascular. La 18F-FDG es un trazador prometedor para detectar VPGI, ya que los leucocitos activados tienen una gran demanda de la 18F-FDG y se acumulan en el lugar de la infección, y podría ayudar a definir la respuesta al tratamiento antibiótico (AU)

Vascular prosthetic graft infection (VPGI) is associated with high mortality and morbidity. An early and accurate diagnosis is essential in order to give the most appropriate treatment. The case is presented of a 74 year old male subjected to an aortobifemoral bypass graft, with clinical suspicion of VPGI with inconclusive tests. Later on an 18F-FDG PET/CT study showed a pathological uptake, suggestive of periprosthetic infection, as well as an incidental pulmonary lesion, suggestive of a primary neoplasm. A new 18F-FDG PET/CT showed a significant improvement in the uptake by the vascular graft after prolonged antibiotic treatment. 18F-FDG is a promising tracer for detecting VPGI as the accumulated activated white cells at the infection site have a high demand for 18F-FDG, and could help define the response to antibiotic treatment (AU)

Usefulness of 18F-FDG PET/CT in a case of suspected vascular graft infection. / Utilidad de la 18F-FDG PET/TC en un caso de sospecha de infección de injerto vascular.

Vascular prosthetic graft infection (VPGI) is associated with high mortality and morbidity. An early and accurate diagnosis is essential in order to give the most appropriate treatment. The case is presented of a 74 year old male subjected to an aortobifemoral bypass graft, with clinical suspicion of VPGI with inconclusive tests. Later on an 18F-FDG PET/CT study showed a pathological uptake, suggestive of periprosthetic infection, as well as an incidental pulmonary lesion, suggestive of a primary neoplasm. A new 18F-FDG PET/CT showed a significant improvement in the uptake by the vascular graft after prolonged antibiotic treatment. 18F-FDG is a promising tracer for detecting VPGI as the accumulated activated white cells at the infection site have a high demand for 18F-FDG, and could help define the response to antibiotic treatment.

18F-FDG-PET/TC en paciente con endocarditis sobre prótesis valvular / 18F-FDG-PET/CT in a case of prosthetic valve endocarditis

No disponible