Keshaw Kumar

Subependymal grey matter heterotopia, also known as periventricular heterotopia, is the most common form of grey matter heterotopia and is characterized by nodules of grey matter located immediately beneath the ependyma of the lateral ventricles. It can be divided according to morphology into 2: unilateral focal bilateral focal bilateral diffuse: an undulating band of grey matter surrounding the ventricles Although the majority of cases are sporadic, some are X-linked recessive (Xq28) 3.

Ectopic pancreatic tissue, also known as heterotopic pancreatic tissue, refers to the presence of pancreatic tissue in the submucosal, muscularis or subserosal layers of the luminal gastrointestinal tract outside the normal confines of the pancreas and lacking any anatomic or vascular connection with the pancreas proper. It is reportedly relatively common, affecting ~5% (range 1-10%) 1 of people. Most commonly an asymptomatic entity.

Peritoneal loose bodies or peritoneal mice are calcified pieces of necrotic tissue found in the peritoneal cavity. They are usually asymptomatic and small, ranging from 0.5 to 2.5 cm in size, but rarely may be up to 5 to 10 cm in size. Loose bodies are usually asymptomatic 1. Peritoneal loose bodies are formed by the torsion and autoamputation of epiploic appendages. Epiploic appendages are susceptible to torsion due to their narrow pedicle.