What does nuclear Palisading mean?
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 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 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 tumors have Homer Wright rosettes?
Homer-Wright rosettes are seen in 25 to 30% of neuroblastomas, usually in poorly-differentiated subtype. They consist of an arrangement of tumor cells around a central area (not a lumen, canal, or a blood vessel) filled with neurofibrillary processes.
What does Basaloid mean?
ba·sa·loid cell a cell, usually of the epidermis, resembling a basal cell.
What is Basaloid?
INTRODUCTION. Basaloid Squamous Cell Carcinoma (BSCC) is a rare and aggressive variant of oral squamous cell carcinoma (OSCC) that was first identified as a separate histopathological entity by Wain et al. ( 1986).[1,2] It is regarded as a high-grade tumor with increased propensity for metastasis to distant sites.
What is the difference between rosette and Pseudorosette?
A rosette is a palisade in a halo or spoke-and-wheel arrangement, surrounding a central core or hub. A pseudorosette is a perivascular radial arrangement of neoplastic cells around a small blood vessel.
What are perivascular Pseudorosettes?
Perivascular pseudorosettes are a common histologic feature of central nervous system ependymomas. They represent sections through papillary structures composed of tumor cells arranged radially around a central vessel.
What is Palisading of cells?
In histopathology, a palisade is a single layer of relatively long cells, arranged loosely perpendicular to a surface and parallel to each other.
What is Gliomatosis cerebri?
Gliomatosis cerebri is a primary central nervous system (CNS) tumor. This means it begins in the brain or spinal cord. This tumor is no longer recognized as a formal diagnosis, rather gliomatosis cerebri refers to a special pattern of diffuse and extensive growth of glioma cells, invading multiple lobes of the brain.
What does the word rosettes mean?
Definition of rosette 1 : an ornament usually made of material gathered or pleated so as to resemble a rose and worn as a badge of office, as evidence of having won a decoration (such as the Medal of Honor), or as trimming. 2 : a disk of foliage or a floral design usually in relief used as a decorative motif.
Are Basaloid cells cancerous?
Basal cell carcinoma is a type of skin cancer. Basal cell carcinoma begins in the basal cells — a type of cell within the skin that produces new skin cells as old ones die off. Basal cell carcinoma often appears as a slightly transparent bump on the skin, though it can take other forms.