Merkel cell carcinoma

Definition

Merkel small room carcinoma (MCC) is a rare form of cancer that unfolds on, or just beneath, the skin and in hair follicles.

Description

Merkel small rooms are cells that lie in the middle layers of the skin. These confined apartments are organized around hair follicles and are believed to act as a certain number of type of touch receptors. MCC begins in these cells

MCC usually appears as firm shiny skin shapeless masss or tumors. These tumors are painless and can range in size from les than a quarter of an inch (06 cm) to above two inches (5.1 cm) in diameter. They may be r pink, or azure Tumors generally first appear upon the head and neck and les repeatedly on other sun-exposed parts of the body

MCC is real aggressive, it spreads very rapidly, and it many times invades other tissues and organs (metastasizes). The greatest in quantity common sites of metastasis of MCC are the lymph nodes, liver, bone lung and brain. Metastasis to the lymph nodes generally present itselfs within seven to eight month after the first skin tumors appear. Nearly half of all nation affected with MCC will exhibit systemic metastases within 24 month and 67% to 74% of these tribe will die within five years.

Local return of MCC after the removal of the primary tumor appears in approximately one-third of all patients and is usually apparent within four months

Several other names have been used to describe MCC among these are: anaplastic carcinoma of the skin, apudoma, endocrine carcinoma of the skin, neuroendocrine carcinoma of the skin (NEC) primary small-cell carcinoma of the skin, primary undifferentiated carcinoma of the skin, and trabecular small room carcinoma. The two most commonly used names are MCC and NEC

Demographics

MCC is seen almost exclusively in Caucasians. It affects males and females equally. It generally make knowns between the ages of 60 and 80 on the contrary it has been seen in a child as young as seven and a woman of 97

By early 2001 solitary approximately 600 cases of MCC had been described in the medical literature. The number of fresh cases of MCC is wait fored to rise as the average life span continues to increase, exposing to the sun remains high, and MCC becomes more recognized by means of medical practitioners.

Causes and symptoms

The cause of MCC has not been positively identified. on the other hand in early 2001, it is believed to be caused by the agency of the skin damage associated with in all senses to ultraviolet light from the sun

The solitary symptom of primary MCC is the appearance of the characteristic tumors in the skin. Lymph node metastases present to view enlarged, firm, lymph nodes in the region of the primary tumor. Other systemic metastases present to view as masses in the affected organs. The location of the primary tumor is not related to the location of these systemic metastases.

Diagnosis

The diagnosis of MCC is performed by dint of examining and testing a biopsy of the tumor. MCC is difficult to differentiate from several other forms of abnormal tissue extension (neoplasms). This diagnosis cannot be made just by means of examining the tumor cells below a microscope. It is done by the agency of performing a variety of chemical ordeals on these cells. Testing must be performed to make confident this is not metastatic oat-cell (lung) cancer.

Treatment team

MCC is generally first identified by means of a microbiologist who examines a biopsy sample. greatest in quantity MCC tumor removals are performed by dint of dermatologists. Post-operative radiation treatments are generally ordered through the dermatologist and performed through a radiation therapist under the direction of a radiologist and/or a radiation physicist.

Because of the rapid and possibly invasive nature of MCC patients are generally referr to a physician specializing in cancer (oncologist) to make secure that the disease has not spread to other parts of the body

Clinical staging, treatments, and prognosis

MCC is classified into three clinical stages. Stage I MCC is defined as a disease that is localized to the skin. Stage II MCC is characterized by means of a spreading of the disease to the lymph nodes that are near the primary skin tumor or tumors. Stage III MCC is characterized through systemic metastases.

Treatment of stage I MCC involves wide local excision and follow-up radiation therapy. Wide local excision is a management in which the tumor and a small area of the surrounding healthy tissue are surgically remov Since MCC is with equal reason aggressive, all patients are considered to be at high risk for return and metastasis. For this reason, all patients will pass through radiation therapy of the lymph nodes near the site of the primary tumor that was remov A technique called lymphoscintigraphy is used to determine the precise location of the lymph nodes that are greatest in quantity likely to be affected.

Treatment of stage II MCC is the same as for stage I MCC with the additional removal of the affected lymph nodes.

Treatment of stage III MCC is generally chemotherapy. on the other hand because the number of known cases of MCC is relatively small, there is no generally prescribed chemotherapy regimen. It has been treated with etoposide, cisplatin, and fluorouracil with varying steps of success.