What are papillary structures?

What are papillary structures?

Papillary structures or small clusters of neoplastic cells arranged in micropapillae may be observed together with monolayers and dispersed thyrocytes. Follicular structures are occasionally seen, and they are frequently observed in the follicular variant of papillary carcinoma.

What is papillary shape?

A papillary tumor is a tumor shaped like a small mushroom, with its stem attached to the epithelial layer (inner lining) of an organ.

What are papillary cells?

Papillary carcinomas are slow-growing, differentiated cancers that develop from follicular cells and can develop in one or both lobes of the thyroid gland. This type of cancer may spread to nearby lymph nodes in the neck, but it is generally treatable with a good prognosis (outlook for survival).

What is papillary change?

Papillary apocrine change is a rare condition that involves the cells lining the inside of the breast duct (epithelium). There is an overgrowth of cells that have “apocrine” features, meaning that the gel-like substance that fills the cell (called cytoplasm) is grainy.

What does the papillary layer contain?

The papillary layer is defined by rete ridges (i.e. papillae) which are finger-like structures extending into the epidermis and contains thin collagen fibres, sensory nerve endings, cytoplasms and a rich network of blood capillaries.

What does papillary layer mean?

Listen to pronunciation. (PA-pih-LAYR-ee DER-mis) The thin top layer of the dermis (the inner layer of the skin). The papillary dermis has connective tissue and blood vessels that give nutrients to the epidermis (the outer layer of the skin) and that help control the temperature of the skin.

What is papillary growth?

A tumor that looks like long, thin “finger-like” growths. These tumors grow from tissue that lines the inside of an organ. Papillary tumors may be benign (not cancer) or malignant (cancer). Papillary tumors occur most often in the bladder, thyroid, and breast, but they may occur in other parts of the body as well.

What is papillary TCC?

Papillary urothelial carcinoma is a form of bladder cancer. It develops within a type of cell in the inner lining of the bladder, ureters, and lower kidneys. The bladder is a muscular organ in the pelvis that stores urine. Bladder cancer develops when abnormal cells in the bladder grow too quickly.

What does carcinoma look like?

It can be pink, brown, or black. At first, a basal cell carcinoma comes up like a small “pearly” bump that looks like a flesh-colored mole or a pimple that doesn’t go away. Sometimes these growths can look dark. Or you may also see shiny pink or red patches that are slightly scaly.

Where is carcinoma found in the body?

Carcinoma is the most common type of cancer. It begins in the epithelial tissue of the skin, or in the tissue that lines internal organs, such as the liver or kidneys. Carcinomas may spread to other parts of the body, or be confined to the primary location.

What does papillary mean in medical terms?

Definition of papillary : of, relating to, being, or resembling a papilla or nipple-shaped projection, mass, or structure : marked by the presence of papillae papillary thyroid carcinoma tumors with papillary projections First Known Use of papillary 1667, in the meaning defined above

What is the papillary muscle in the heart?

Papillary muscle: A small muscle within the heart that anchors the heart valves. The anchor ropes are the chordae tendineae, thread-like bands of fibrous tissue that attach on one end to the edges of the tricuspid and mitral valves of the heart and on the other end to the papillary muscles.

What happens when the papillary muscles contract?

The papillary muscles start to contract just before the ventricles contract, to prepare the valves for high ventricular pressure. They pull on the chordae tendinae or heart strings, maintaining tension until the ventricles relax in diastole. The valves then open and the next cardiac cycle begins.

What is a papillary projection?

adj similar to a small, nipple-shaped elevation or projection. papillary layer, n the most superior layer of the dermis. Characterized by papillae, fingerlike projections that interdigitate with the epidermis.