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Watch the video on Squamous Intraepithelial lesion & CANCER CERVIX in the link below • Squamous Intraepithelial lesion & CAN... Squamous papilloma: SQUAMOUS PAPILLOMA Squamous papilloma is a benign growth that occurs on the surface of the skin or mucous membranes. It is characterized by finger-like projections or papillae, which are made up of an overgrowth of squamous epithelial cells. Squamous papillomas can occur at various sites in the body, but some of the most common locations include: Skin: Squamous papillomas can develop on the skin, particularly in areas that are frequently exposed to sunlight, such as the face, neck, arms, and hands. Oral cavity: Squamous papillomas can occur in the mouth, including on the tongue, tonsils, and inside the cheeks. Larynx: Squamous papillomas can develop on the vocal cords and other areas of the larynx, causing symptoms such as hoarseness and difficulty breathing. Genital area: Squamous papillomas can develop on the genitals, including on the penis, vulva, vagina, and anus. These are often caused by HPV infection. Nasal cavity and sinuses: Squamous papillomas can occur in the nasal cavity and sinuses, causing symptoms such as nasal congestion and difficulty breathing. Esophagus: Squamous papillomas can develop in the esophagus, causing difficulty swallowing and other symptoms. Etiology: Squamous papillomas can be caused by a variety of factors, including infection with the human papillomavirus (HPV), smoking, or exposure to other irritants. However, in the vast majority of cases, HPV is the underlying cause of squamous papillomas. There are over 100 different strains of HPV, and some strains are more likely to cause squamous papillomas than others. HPV types 6 and 11 are the most common causes of squamous papillomas in the oral cavity and respiratory tract Pathogenesis: HPV infects the cells of the skin or mucous membranes and can cause them to divide and grow abnormally, leading to the formation of a papilloma. The exact mechanism by which HPV causes squamous papilloma is not completely understood, but it is thought to involve the E6 and E7 viral oncoproteins produced by the virus. These proteins can interfere with the normal regulation of cell growth and division, leading to the formation of abnormal growths. When HPV infects cells, it can integrate its genetic material into the host cell’s DNA, leading to the expression of viral oncoproteins. These oncoproteins can interfere with the normal functioning of cellular proteins that regulate cell growth and differentiation. As a result, cells infected with HPV can begin to divide and grow uncontrollably, forming a squamous papilloma. The development of squamous papilloma is also influenced by other factors, such as the immune system’s response to the virus, genetic factors, and environmental factors such as exposure to certain chemicals or toxins. These factors can affect the ability of the body to control HPV infection and may contribute to the formation of squamous papilloma. Read http://ilovepathology.com/squamous-pa...