What is the most common early sign of bladder cancer?

Rationale:

A. Very low-density lipoprotein (VLDL) is incorrect. VLDL is considered a “bad” lipoprotein because it carries triglycerides from the liver to peripheral tissues and can contribute to plaque formation in arteries. Elevated VLDL levels increase the risk of atherosclerosis and cardiovascular disease.

B. High-density lipoproteins (HDL) is correct. HDL is referred to as “good cholesterol” because it transports excess cholesterol from peripheral tissues back to the liver for excretion or recycling. High levels of HDL are associated with reduced risk of atherosclerosis and cardiovascular events. HDL also has anti-inflammatory and antioxidant properties, providing additional protection to blood vessels.

C. Intermediate-density lipoproteins (IDL) is incorrect. IDL is a transitional lipoprotein formed during the metabolism of VLDL to LDL. It is considered atherogenic, meaning it can contribute to plaque buildup, and is not classified as “good cholesterol.”

D. Low-density lipoproteins (LDL) is incorrect. LDL is commonly referred to as “bad cholesterol” because it transports cholesterol from the liver to peripheral tissues, where it can deposit in the arterial walls and lead to atherosclerosis, heart attacks, and strokes.

Rationale:

A. Keloids are raised, thickened scars that extend beyond the boundaries of the original wound. They result from excessive collagen deposition during the healing process and can cause cosmetic concerns, itching, and discomfort.

B. Adhesions are bands of fibrous scar tissue that can form between internal organs or tissues following surgery, injury, or severe burns. They can restrict organ movement, cause pain, or lead to complications such as bowel obstruction, depending on their location.

C. Contractures occur when scar tissue tightens during healing, limiting joint mobility. This is a common complication of deep partial-thickness or full-thickness burns and can lead to functional impairment if not managed with physical therapy, splinting, or surgical intervention.

D. Excessive scar formation does not cause increased hair growth. In fact, scar tissue often lacks hair follicles, sweat glands, and sebaceous glands, resulting in areas that may be hairless and less functional.

E. Scar tissue is generally less elastic than normal skin due to dense collagen deposition and abnormal alignment of fibers. Excessive scarring can lead to stiffness and limited flexibility rather than enhanced elasticity.