Skin and Subcutaneous Tissue


Skin and Subcutaneous Tissue

The skin is the largest and among the most complex organs of the body. Although the skin functions simply as a protective barrier to interface with our environment, its structure and physiology are complex. The skin protects against most noxious agents, such as chemicals (by the impermeability of the epidermis), […]


MALIGNANT TUMORS

Epidemiology Increased exposure to ultraviolet radiation is associated with an increased development of all three of the common skin malignancies; basal cell carcinoma, squamous cell carcinoma, and melanoma. Chemical carcinogens such as tar, arsenic, and nitrogen mustard are known carcinogens. Human papillomavirus has been found in certain squamous cell cancers […]


BENIGN TUMORS OF SKIN

Cysts (Epidermal, Dermoid, Trichilemmal) Epidermal cysts are the most common type of cutaneous cyst and can occur anywhere on the body as a single, firm nodule. Trichilemmal (pilar) cysts, the next most common, occur more often in females and usually on the scalp. When ruptured, these cysts have a characteristic […]


Inflammatory Diseases of Skin

Pyoderma Gangrenosum Pyoderma gangrenosum (PG) is a relatively uncommon destructive cutaneous lesion that is associated with an underlying systemic disease including inflammatory bowel disease, rheumatoid arthritis, hematologic malignancy, and monoclonal immunoglobulin A (IgA) gammopathy. Recognition of the underlying disease is of paramount importance in the management of skin ulceration because […]


INJURIES TO SKIN AND SUBCUTANEOUS TISSUE

INJURIES TO SKIN AND SUBCUTANEOUS TISSUE Injuries that violate the continuity of the skin and subcutaneous tissue can occur as a result of trauma or from various environmental exposures. Environmental exposures that damage the skin and subcutaneous tissues include caustic substances, exposure to extreme temperatures , prolongedof the skin allows […]


SKIN ANATOMY AND PHYSIOLOGY

The skin is the largest and among the most complex organs of the body. Although the skin functions simply as a protective barrier to interface with our environment, its structure and physiology are complex. The skin protects against most noxious agents, such as chemicals (by the impermeability of the epidermis), […]