Periodic review of pathology training program teaching files: a quality improvement study.

Pathology training programs typically retain teaching files of classic and unusual diagnostic cases. Since diagnostic criteria and terminology are mutable, we reviewed a surgical pathology teaching archive to determine if the materials continued to be acceptable for educational purposes. Each case (from 2001-2003) consisted of 1 to 3 slides and a 3 x 5 card with clinical information and the diagnosis.

Analysis of the human fetal liver hematopoietic microenvironment.

In the adult, hematopoietic stem cells (HSCs) are resident in the bone marrow (BM) compartment and are in direct association with the BM stromal microenvironment. However, human adult HSCs are largely quiescent and undergo limited self-renewal. This is in contrast to the higher frequency of cycling HSCs undergoing self-renewal during fetal development when hematopoiesis is transiently localized to the fetal liver (FL), suggesting that FL provides a more conducive microenvironment to support HSCs.