Orthotopic transplantation experiments have shown that in birds, under normal conditions, mesectodermal capabilities seem restricted to the cephalic neural crest down to the level of the 5th somite. In the present study the mesectodermal capabilities of trunk and lumbar neural crest were investigated at early stages of development by heterotopic, heterospecific transplantation of the neural pri...

The neural crest (NC) of vertebrate embryos yields cell types belonging to the neural, melanocytic and mesectodermal lineages. To test the possibility that the precursors of these lineages segregate from pluripotent cells by a process involving stochastic determinants, we have analyzed with statistical methods the associations between six differentiated cell types in 201 clones obtained in vitr...

We have investigated the roles of the single-minded (sim) and rhomboid (rho) genes in generating distinct cell fates in the Drosophila embryonic neuroectoderm. We show that sim functions to repress ventral ectodermal cell fates, as in sim mutants mesectodermal cells adopt the fates of neighboring ventral ectodermal cells and targeted sim expression in P[paired.Gal4]/P[UAS-sim] embryos results i...

leiomyomas are benign tumors of the soft tissue and may develop in any location where smooth muscle is present. leiomyoma in the inferior vena cava is a rarely seen pathology, and symplastic leiomyoma is also a rare histological variant of leiomyoma. in this case, we present a rare histological variant of symplastic leiomyoma in the inferior vena cava (ivc). this is the first radiologically rep...

Background and Objective: For nearly a century, it has been suspected that reproductive tract infections play an etiologic role in uterine leiomyoma. However, no epidemiologic study of leiomyoma has used the polymerase chain reaction (PCR) to compare uterine tissues from cases and non-cases, and to investigate associations between uterine leiomyoma and infections detected by PC...

Uterine leiomyoma is the most common benign tumor of genital tract. The etiology of myomas is unknown. Leiomyoma shows a broad spectrum of radiographic appearances depending on the number, size, and location of the tumor. The diagnostic method for uterine leiomyomas is based primarily on the clinical situation. Despite of the varied diagnostic options such as; transvaginal sonography, sonohyste...