Question 1: Identify the type of skin lesion shown in the image.
- A. Papule
- B. Patch
- C. Nodule
- D. Macule (Correct Answer)
Explanation: ***Macule***
- The lesion shown is a **macule**, characterized by being **flat and circumscribed** with no elevation above the skin surface.
- A macule is defined as a **skin discoloration less than 1 cm in diameter** without any palpable change in texture or thickness.
- Classic examples include **freckles, flat nevi, and café-au-lait spots**.
- The image demonstrates the typical appearance with clear borders and no vertical component.
*Papule*
- A papule is an **elevated, solid lesion less than 1 cm** in diameter.
- Unlike the lesion shown, papules have a **palpable raised component** above the skin surface.
- Examples include acne, warts, and lichen planus.
*Patch*
- A patch is similar to a macule but is **larger than 1 cm in diameter**.
- While also flat, the size criterion differentiates it from a macule.
- Examples include vitiligo patches and large birthmarks.
*Nodule*
- A nodule is a **solid, elevated lesion greater than 1 cm** that extends into deeper skin layers.
- It has both elevation and depth, unlike the flat lesion shown.
- Examples include dermatofibromas, lipomas, and some cysts.
