What is an Umbilical Sinus (Patent Urachus) ? An umbilical sinus (also known as a patent urachus) is a small opening in the abdomen that leads to the bladder. It is caused by the incomplete closure of the urachus, a tube that connects the bladder to the umbilicus during fetal […]
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), […]
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 […]
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 […]
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 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 […]
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), […]
