Osteoporosis is a condition that causes the bones to become weak and brittle, leading to an increased risk of fractures. It is most commonly diagnosed in postmenopausal women, but it can also affect men and people of all ages.

Dermatosis papulosa nigra (DPN) is a common skin condition that affects people with dark skin tones, particularly those of African descent. It is characterized by small, dark bumps on the skin, typically found on the face, neck, and upper chest.

The anterior cruciate ligament, or ACL, is a crucial part of the knee joint. It helps to stabilize the knee and prevent excessive movement. Unfortunately, the ACL can be easily injured, especially during sports or other physical activities.