RESUMEN
The instigation of the Kasai procedure in infants who are born with biliary atresia has led to increased survival in this population for over half a century. The many complications that arise as a result of biliary atresia led to an early death for most patients. However, the Kasai procedure is not without its own impediments. Among them is the development of hepatocellular carcinoma. We present two cases of hepatocellular carcinoma, after Kasai procedure, from two different age groups, as a recommendation that these patients should be even more closely monitored. Furthermore, if they are in need of transplant, we recommend that the explanted livers be carefully examined, as the tumor may not have been diagnosed preoperatively.
RESUMEN
Heterotopic gastric mucosa (HGM) is a rare, but acknowledged source of gastrointestinal pathology in pediatric patients. Sometimes clinically confused with a Meckel's diverticulum, HGM diagnosis is often made postoperatively by pathology. We present a case of jejunal HGM with a positive technetium pertechnetate scan in the right lower quadrant that resembled a Meckel's diverticulum.
Asunto(s)
Coristoma/diagnóstico por imagen , Mucosa Gástrica , Enfermedades del Yeyuno/diagnóstico por imagen , Divertículo Ileal/diagnóstico , Niño , Coristoma/cirugía , Diagnóstico Diferencial , Femenino , Gastrectomía , Humanos , Enfermedades del Yeyuno/cirugía , Tomografía de Emisión de PositronesRESUMEN
The embryonic origin of umbilical cord vestiges is well documented; however, their immunophenotype is unknown. This study was conducted to determine whether vitelline and allantoic remnants can be differentiated using immunohistochemical markers. All allantoic remnants were stained with p63 and were negative for CDX2, whereas the vitelline remnants stained with CDX2 and were negative for p63. An unexpected finding was a small number of morphologically ambiguous cases that stained with both markers in a complimentary manner. The term "hybrid" remnant is proposed for these remnants.
Asunto(s)
Alantoides/ultraestructura , Cordón Umbilical/ultraestructura , Membrana Vitelina/ultraestructura , Alantoides/metabolismo , Biomarcadores/metabolismo , Factor de Transcripción CDX2 , Eosina Amarillenta-(YS) , Femenino , Expresión Génica , Hematoxilina , Proteínas de Homeodominio/genética , Proteínas de Homeodominio/metabolismo , Humanos , Inmunohistoquímica , Masculino , Proteínas de la Membrana/genética , Proteínas de la Membrana/metabolismo , Coloración y Etiquetado , Cordón Umbilical/metabolismo , Membrana Vitelina/metabolismoRESUMEN
Acute lymphoblastic leukemia is predominantly found in children. It is a neoplasm of precursor cells or lymphoblasts committed to either a B- or T-cell lineage. The immature cells in B-acute lymphoblastic leukemia/lymphoma can be small or medium sized with scant or moderate cytoplasm and typically express B-cell markers such as CD19, cytoplasmic CD79a, and TdT without surface light chains. These markers, along with cytogenetic studies, are vital to the diagnosis, classification, and treatment of these neoplasms. We present an unusual case of a precursor B-cell ALL, in an 82-year-old woman, who presented with pancytopenia and widespread lymphadenopathy. The cells show L3 morphology (Burkitt-like lymphoma) with coexpression of TdT and surface light chains in addition to an MYC gene translocation and Philadelphia chromosome.