Pa l a b r a s c l a v e : Tu m o r e s t r o m a l , Tu m o r gastrointestinal.
IntroducciónEl Tumor Estromal Gastrointestinal (GIST) es la neoplasia mesenquimatica más común del tracto digestivo; sin embargo su frecuencia representa solo un 0.1 a 3% de las neoplasias gastrointestinales. Anteriormente, eran clasificados como leiomiomas, leiomiosarcomas, leiomioblastomas, schwannomas o neurofibromas del tracto digestivo (1) . Sin embargo, la observación en el año 1983, que los GISTs expresaban en los estudios inmunohistoquimicos un receptor para el factor de crecimiento de la tirosina kinasa, llamado CD117 en un 100% de los casos, y la proteína CD34 en el 70% de los casos, estableció la diferencia con los tumores mencionados. Otros posibles marcadores tumorales incluyen vimentina, actina, proteína S-100 y desmina.Los GISTs se originan de una célula precursora común, la célula intersticial de Cajal o marcapasos intestinal, o bien de una célula troncal más primitiva de la cual derivan la célula de Cajal y las células musculares lisas (2) .Se pueden localizar en cualquier parte del tracto gastrointestinal, así como también en omento, mesenterio o retroperitoneo.Un 70% se ubican en estómago (4) , un 20-30% en el intestino delgado y un 7% en la región anorrectal. A diferencia del resto del tubo digestivo, en el esófago los leiomiomas son más frecuentes.El 70-80% de los GISTs son benignos. Hallazgos sugerentes de malignidad son localización extragástrica, tamaño superior a 5 cm, un alto
Traumatic injuries of the diaphragm are a known consequence of severe trauma, usually of the blunt type. Its incidence is increasing due to the rise in number and severity of accidents, especially car accidents. Diagnosing a traumatic diaphragmatic rupture is still a challenge for both radiologists and surgeons, with a delayed diagnosis in more than half of cases, with the consequent development of latent hernia. This hernia may manifest with symptoms varying from unspecific to bowel strangulation. We present the case of a patient with colonic obstruction secondary to a traumatic diaphragmatic hernia, with previous history of a penetrating thoracoabdominal trauma seven years before. Radiologic methods and signs for the diagnosis of this pathology are reviewed.
May E. y cols. Metalosis por titanio. Diagnóstico diferencial de masa de compartimiento iliopsoas. Caso clinico. Rev
Abstract:An 52 year-old female patient with right hip joint Tuberculosis, received a Titanium total joint arthroplasty in 1991. Eleven years later, she presented low extremity swelling and inguinal mass, which was studied with ultrasound and computed tomography. The main differential diagnosis was an iliopsoas sarcoma, so an ultrasound-guided biopsy was performed. The result was Titanium particle debris. The lesion was removed, but it recurred, so that joint replacement was required.Joint Titanium particle wear debris a condition due to particle releaseis as an arthroplasty complication. When its clinical manifestation is a pelvic mass, the main differential diagnoses include tumors and granulomatous disease. Both clinical manifestations and the radiology are variable. This pathology in patient with hip joint Titanium arthroplasty must be consided.
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