MICROANATOMY

Detailed explanation-1: -Columnar epithelial cells have a rectangular or column shape, meaning that they are taller than they are wide. The nucleus is also elongated, having a long oval shape. They have an organelle rich cytoplasm. These cells may have apical projections, such as microvilli or cilia.

Detailed explanation-2: -Cell shapes can be squamous (flattened and thin), cuboidal (boxy, as wide as it is tall), or columnar (rectangular, taller than it is wide).

Detailed explanation-3: -Tall columnar cells can be seen in different variants of papillary thyroid carcinoma (PTC). Tall cell variant of PTC shows elongated and closely packed follicles lined by a single layer of tall cells producing a so-called “tram-track” appearance (A).

Detailed explanation-4: -Simple columnar epithelium is a single layer of columnar epithelial cells which are tall and slender with oval-shaped nuclei located in the basal region, attached to the basement membrane. In humans, simple columnar epithelium lines most organs of the digestive tract including the stomach, and intestines.