Dasatinib-induced spleen contraction leads to transient lymphocytosis.

The tyrosine kinase inhibitor dasatinib is approved for Philadelphia chromosome-positive leukemia, including chronic myeloid leukemia (CML). Although effective and well tolerated, patients typically exhibit a transient lymphocytosis after dasatinib uptake. To date, the underlying physiological process linking dasatinib to lymphocytosis remains unknown. Here, we used a small rodent model to examine the mechanism of dasatinib-induced lymphocytosis, focusing on lymphocyte trafficking into and out of secondary lymphoid organs. Our data indicate that lymphocyte homing to lymph nodes and spleen remained unaffected by dasatinib treatment. In contrast, dasatinib promoted lymphocyte egress from spleen with kinetics consistent with the observed lymphocytosis. Unexpectedly, dasatinib-induced lymphocyte egress occurred independently of canonical sphingosine-1-phosphate-mediated egress signals; instead, dasatinib treatment led to a decrease in spleen size, concomitant with increased splenic stromal cell contractility, as measured by myosin light chain phosphorylation. Accordingly, dasatinib-induced lymphocytosis was partially reversed by pharmacological inhibition of the contraction-promoting factor Rho-rho associated kinase. Finally, we uncovered a decrease in spleen size in patients with CML who showed lymphocytosis immediately after dasatinib treatment, and this reduction was proportional to the magnitude of lymphocytosis and dasatinib plasma levels. In summary, our work provides evidence that dasatinib-induced lymphocytosis is a consequence of drug-induced contractility of splenic stromal cells.

Complete spontaneous regression of a primary renal cell carcinoma. Report of a pathological proven case and review of the literature.

Regression of primary renal cell carcinoma (RCC) is a rare phenomenon and for several reasons many of the reported cases have been questioned. We present a case that can be considered a true spontaneous and complete regression of a primary RCC. A 79-year-old female underwent nephrectomy because a renal tumor. At the time of surgery image studies showed a small para-aortic lymph node. The tumor measured 3cm and was analyzed completely. Histology showed a fibro-inflammatory lesion with necrosis, foamy macrophages and inflammatory cells. No neoplastic cells were observed and the lesion was interpreted as a localized type of xanthogranulomatous pyelonephritis. One year later a CT control scan, showed that the para-aortic lymph node had increased in size to 4cm. Fine needle aspiration revealed features of clear RCC. Metastatic dissemination was limited so surgical removal of the para-aortic lymph node was performed and the cytologic diagnosis confirmed.

The Spanish flu and the fiction literature / La gripe española de 1918 y la literatura de ficción

This review focuses on the fictional literature in which the Spanish flu is represented either as an anecdotal or as a historical aspect and the effect on the author or fictional character. We examine this sociocultural period in the press and mainly in Anglo-Saxon literary works and from other countries, including Spanish and Latin American literature that is not very represented in some international reviews on the subject. Also, we include books about the previous and subsequent influenza pandemics to the Spanish flu

Esta revisión se centra en la literatura de ficción en la que la gripe española se representa como un aspecto anecdótico o histórico y el efecto sobre el autor o el personaje ficticio. Examinamos este período sociocultural en la prensa y principalmente en obras literarias anglosajonas y de otros países, incluida la literatura española y latinoamericana que no está muy representada en algunas revisiones internacionales sobre el tema. Además, incluimos libros sobre las pandemias de influenza anteriores y posteriores a la gripe española

John Donne, Spanish Doctors and the epidemic typhus: fleas or lice? / John Donne, médicos españoles y el tifus epidémico: ¿pulgas o piojos?

We describe the infections that appeared in the life and work of John Donne (1572-1631), the English metaphysical poet, mainly the exanthematic typhus that suffered and gave arise to his work Devotions upon emergent occasions, and several steps in my sickness. We discuss the vector of transmission of this disease, in comparison of other infections in that period, that Donne's scholars have related to the flea without mentioning the body louse, the true vector of the exanthematic typhus. Likewise, we mention the exanthematic typhus's symptoms in his Devotions in comparison with the Luis de Toro's or Alfonso López de Corella's works, Spanish doctors in those times and the first doctors in write books about the disease, and the singular treatment of pigeon carcasses on the soles of the feet in English Doctors but not in Spanish Doctors

Se describen las infecciones que aparecieron en la vida y la obra de John Donne (1572-1631), el poeta metafísico inglés, principalmente el tifus epidémico que padeció y que dio lugar a su obra "Devotions upon emergent ocassions, and several steps in my sickness". Discutimos el vector transmisor de la enfermedad, en comparación de otras infecciones en ese periodo, que los estudiosos de Donne han relacionado a las pulgas y sin mencionar el piojo del cuerpo que es el verdadero vector del tifus epidémico. Además, mencionamos los síntomas de la enfermedad en su obra "Devotions" en comparación con los trabajos de Luis de Toro o Alfonso López Corella, médicos españoles de su tiempo y los primeros en escribir los tratados sobre la enfermedad, y el tratamiento singular de las carcasas de palomas en las palmas y plantas de los pies en los médicos ingleses pero no presente en los médicos españoles

A bronchobiliary fistula due to giant hydatid cyst.

Intrathoracic rupture of hydatid cyst of the liver is a rare but severe complication of echinococcal disease. It represent a serious condition responsible for lesions at 3 levels: hepatic, diaphragmatic, and pulmonary. Early diagnosis and management of septic associated complications are essential. We present the case of a 55 year old female patient with a giant hydatid cyst type CE 2 based on WHO Classification, communicating with the biliary tree and with a massive extension to the right hemithorax.

A bronchobiliary fistula due to a giant hydatid cyst

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Abdominal complications following hematopoietic stem cell transplantation.

Abdominal complications affect more than 80% of patients who undergo hematopoietic stem cell transplantation (HSCT) for treatment of benign or malignant hematologic disease and some solid tumors. HSCT can be performed using cells from bone marrow, peripheral blood, or umbilical cord blood. These stem cells may be from the patient him- or herself (autologous transplant), from relatives or nonrelatives with very similar human leukocyte antigen (allogeneic transplant), or from an identical twin (syngeneic transplant). Posttransplantation complications are classified according to the amount of time elapsed between transplantation and onset. Complications that occur during the first 100 days are divided into preengraftment phase complications (≤30 days after transplantation) and early posttransplantation phase complications (31-100 days after transplantation) and include infectious and noninfectious conditions such as hepatic veno-occlusive disease (VOD), hemorrhagic cystitis, neutropenic colitis, benign pneumatosis, and acute graft-versus-host disease (GVHD). Hepatic VOD, neutropenic colitis, and acute hemorrhagic cystitis are associated with the pretransplantation conditioning regimen. After the first 100 days, chronic GVHD and lymphoproliferative disease are the main complications. Computed tomography and ultrasonography are the primary imaging techniques used in HSCT patients and can help make an early diagnosis, grade the severity of impact, and (if necessary) recommend further investigations to confirm the diagnosis.