Carcinoma pictures

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Carcinoma pictures
Carcinoma pictures

Carcinoma is a form of a malignant tumor that emerges from the epithelial cells lining the inner and outer surfaces of the body. It also refers to a form of dangerous tumor that consists of cells of unknown histogenesis. These transformed cells contain some definite molecular or histological characteristics that are linked with epithelial cells. Histogenesis is most often associated with creation of cytokeratins or intercellular bridges. It most commonly appears in body parts such as the prostate, lung, breast, stomach, or bowel. Chief cancer types found in human beings are carcinomas.

Depending on whether the cancer spreads to the underlying tissues or stays confined to the original site, carcinoma can be characterized as either in situ or invasive. In the latter form, cancer cells spread to other forms of the body, while in situ, focus of carcinoma is limited to one area and it does not get invaded through the epithelial basement membrane, which delimits the malignant tumor from spreading to nearby parts and tissues. Carcinoma when confined to the original site is a pre-invasive cancer, and one should not mistake it for a pre-malignant entity.

Carcinoma in situ may aggravate to become an invasive carcinoma and soon spread to other vital organs of the body if it is not completely removed by surgery, cryotherapy, or some other treatment options. In some cases, carcinoma in situ can heal and disappear on its own.

Classification of Carcinoma

Malignant tumor can occur in varied forms. So far, there has been no defined simple way to classify these exceptionally heterogeneous entities. Malignant neoplasms are classified in different criteria, using a combination of factors such as:

  • Type of the cell and tissue architecture
  • Anatomical spot from which they crop up
  • Molecular features
  • Carcinoma can be classified depending upon the extent to which they bear resemblance to normal tissues
  • Putative cell of origin
Categorization

Malignant adenocarcinoma - A carcinoma of epithelia that originates in glandular tissue is referred to as adenocarcinoma. In malignant adenocarcinomas, cancerous cells do not remain limited to skin, glands and tissues lining the cavities and other vital parts of the body. This form of carcinoma can start in the glands and also arise in several tissues owing to the ubiquitous nature of glandular tissues within the body. Although each gland may not produce the same substance, it is considered glandular due to its exocrine function to the cell. Malignant adenocarcinomas spread to other vital and often metastasize if it is allowed to grow over a considerable period of time.

Squamous cell carcinoma - It is a form of carcinoma that may occur in body parts that remain largely exposed to sun rays and other forms of ultraviolet radiation for longer duration. This malignant tumor generally takes place in organs such as the esophagus, urinary bladder, vagina, lips, ears, mouth, prostate, skin, lungs and cervix. Small bump or a sore that appears flat and crusty may appear on the surface of the skin in this malignant carcinoma of squamous epithelium. It is an invasive carcinoma form in which the cancerous cells may spread to other vital parts of the body such as the bloodstream, nerve routes and the lymphatic system. This form of carcinoma features keratinization, squamous pearls, intercellular bridges and other characteristics of squamous differentiation.

Anaplastic -It is a form of undifferentiated carcinoma that is characterized by monotonous appearing cells. These cells do not have histological or cytological evidence, which can be found in differentiated neoplasms. It refers to revision of differentiation in cells and is found to occur largely in the lower respiratory tract, causing small cell lung carcinoma, large cell lung carcinoma, and pleomorphic carcinoma.

Metastatic carcinoma - This form of tumor occurs largely in the breast and the lungs. It can be diagnosed by conducting a biopsy or by subtotal removal of single node.

Basal cell carcinoma - It is one of the most commonly occurring forms of skin carcinoma. In this form of malignant tumor, cancerous cells begin to appear in the upper most layer of the skin called the epidermis. It grows slowly and painlessly. It appears on face, neck, hands, chest, ears, back, and legs. Sore or red bump that oozes blood or a fluid is a common symptom of carcinoma. This form of carcinoma is caused because of excessive exposure to sun rays.

In some cases, tumors are referred to by the putative cell of origin or by the presumptive organ of the primary site such as carcinoma of the prostate. Hepatocellular carcinoma and renal cell carcinoma are some other examples of carcinoma by the putative cell of origin.

Carcinoma pictures
Basal cell carcinoma Carcinoma Carcinoma on face Carcinoma skin cancer
Basal cell carcinoma Carcinoma Carcinoma on face Carcinoma skin cancer