What is a rosette formation?

rosette formation. The in vitro formation of clusters consisting of a cell (usually a lymphocyte) surrounded by antigenic cells or antigen–bearing particles (usually erythrocytes, which may or may not be coated with antibody or antibody and complement).

What is Homer Wright rosettes?

Homer Wright rosettes are differentiated tumor cells grouped around a central region containing neuropil (therefore its association with tumors of neuronal origin).

What is nuclear palisading?

Nuclear palisading is a characteristic feature which is typically seen in neural tumours such as neurilemmoma, and also in some other tumours. We report here three patients with basal cell carcinoma who showed histological patterns similar to nuclear palisading.

What are rosettes in biology?

In botany, a rosette is a circular arrangement of leaves or of structures resembling leaves.

What is rosette formation in RBC?

Erythrocyte rosetting or E-rosetting is a phenomenon seen through a microscope where red blood cells (erythrocytes) are arranged around a central cell to form a cluster that looks like a flower. The red blood cells surrounding the cell form the petal, while the central cell forms the stigma of the flower shape.

What are palisading nuclei?

What does Basaloid mean?

Resembling that which is basal, but not necessarily basal in origin or position.

What is palisading necrosis?

Definition. A morphologic appearance consisting of small, irregular regions of necrosis surrounded by dense accumulations of tumor cells; the tumor cells are more densely packed at the edge of the necrosis than in other regions of the tumor and thus appear to “palisade” around the necrotic zone. [

What is peripheral palisading mean?

Peripheral palisading is easily identified. C: An intermediate- power image shows irregular islands and cords of basaloid cells set within a desmoplastic or sclerosing stroma. This is an example of the sclerosing (desmoplastic, morpheaform) variant..

What does Palisading mean histology?

In histopathology, a palisade is a single layer of relatively long cells, arranged loosely perpendicular to a surface and parallel to each other. A rosette is a palisade in a halo or spoke-and-wheel arrangement, surrounding a central core or hub.

What is the difference between superficial and nodular BCC?

Superficial BCCs were mostly on the trunk, morpheic BCCs were mostly on the head and neck, and nodular BCCs were mostly on the head and neck, in this cohort. A recent analysis suggests that the incidence of BCC in women may be on the rise.