The impact of microsatellite stability status in colorectal cancer.

Several forms of genomic instability are known to drive the development of colorectal cancer (CRC). Chromosomal instability is the most common type found in 85% of the CRC, while 15% patients have microsatellite instability (MSI). MSI tumors are the subset of CRC that are characterized by dysfunction of mismatch repair genes (MMR) causing failure to repair errors in repetitive DNA sequences called microsatellites.

Acute chest syndrome: sickle cell disease.

Acute chest syndrome (ACS) is a common complication and reason for hospital admission in patients with sickle cell disease (SCD). It is also the most common cause of death in this patient population. Most of the time, the trigger for ACS in an individual patient cannot be identified.