(3) Nodule (see figure 4-4). This is a palpable solid, rounded or elevated
lesion extending deeper into the dermis than papule and greater than 0.5 cm but less
than 2 cm in diameter. Some typical nodules are keratinous cysts, small lipomas, and a
variety of neoplasms. Larger nodules are classified as tumors, benign or malignant.
Figure 4-4. Nodule.
Tumor. This is an elevated, solid lesion greater than 2 cm in diameter.
(5) Wheal (see figure 4-5). An elevated lesion with increased tissue fluid
usually associated with itching. These are known as common allergic reactions from
drug eruptions, insect stings or bits, or sensitivity to cold, heat, pressure, or sunlight.
Figure 4-5. Wheal.
(6) Plaque. A collection of wheals that joined (coalesced) together to form a
larger area. The skin appears thickened, and the skin markings are accentuated.
(7) Vesicle (see figure 4-6). An elevated, fluid-filled lesion less than 0.5 cm
in diameter (small blister). Some examples of vesicles are found in acute eczematous
dermatitis and second degree burns.