Lesson 10 — Dermatology Assisting
All procedural steps, PURPOSE rationales, and topic content below are verbatim from MedCerts HLT420A Storyline modules. Quiz items have been normalized to multiple-choice format with verbatim source rationales. Reference textbook: Niedzwiecki & Pepper, Kinn's The Clinical Medical Assistant, 15th ed., Chapter 17. No outside material added.
- Compare common skin disorders, diseases, and injuries
- Differentiate benign and malignant lesions
- Discuss dermatology and related diagnostic and treatment procedures
- Summarize the medical assistant's responsibilities related to dermatology
Skin Lesions
Goal: To understand the various types of primary and secondary skin lesions.
Papule is a primary lesion. The solid elevation less than 0.5cm in diameter. An example is allergic eczema.
Pustule is a primary lesion. It is a vesicle filled with pus. An example is acne.
Atrophy is a secondary lesion. It's loss of some portion of the skin. An example is paralysis.
Macule is a primary lesion. The Flat area of color change with no elevation or depression. An example is freckles.
Ulcer is a secondary lesion. It is the area of destruction of entire epidermis. An example is decubitus or a pressure sore.
Plaque is a primary lesion. Flat elevated surface found on skin or mucous membrane. An example is thrush.
Scar is a secondary lesion. It excess collagen production after injury. An example is surgical healing.
Crust is a secondary lesion. Dride exudate on skin. An example is impetigo.
Scales is a secondary lesion. Flakes of cornified skin layer. An example is psoriasis.
Tumor is a primary lesion. It is a solid mass larger than 1 cm. An example of squamous cell carcinoma.
Fisher is a secondary lesion. It cracks in the skin. An example is athlete's foot.
Nodule is a primary lesion. Solid elevation 0.5 to 1 cm in diameter extends deeper into the dermis than papule. An example is a mole.
Bulla is a primary lesion. It is a large blister greater than 0.5 cm. An example is a burn.
vesicle is a primary lesion. Small blister fluid within or under the epidermis. An example is Herpesvirus Infection.
Wheal is a primary lesion type of Plaque. Result is a transient edema in dermis. Example is intradermal skin test.
Knowledge-check items
Click an answer to lock it in — you'll see the rationale below. Reset any time to re-attempt. Items originally formatted as true/false, fill-in-blank, or drag-and-drop have been normalized to multiple choice; the source format is noted in the eyebrow.
L10-01 · Skin Lesions
"Nodule is a primary lesion. Solid elevation 0.5 to 1 cm in diameter extends deeper into the dermis than papule."
A nodule is specifically characterized by its depth into the dermis, distinguishing it from the more superficial papule.
"Wheal is a primary lesion type of Plaque. Result is a transient edema in dermis. Example is intradermal skin test."
A wheal is specifically defined by the transient edema it produces in the dermis, commonly seen with allergic reactions or skin testing.
"Fisher is a secondary lesion. It cracks in the skin. An example is athlete's foot."
A fissure (spelled as 'Fisher' in source) is the secondary lesion characterized by skin cracks, with athlete's foot being a common clinical example.
"Atrophy is a secondary lesion. It's loss of some portion of the skin. An example is paralysis."
Atrophy describes partial loss of skin tissue, distinct from ulceration which involves complete epidermal destruction.
"Pustule is a primary lesion. It is a vesicle filled with pus. An example is acne."
A pustule is specifically a pus-filled vesicle, distinguishing it from a clear fluid-filled vesicle.
"Ulcer is a secondary lesion. It is the area of destruction of entire epidermis. An example is decubitus or a pressure sore."
An ulcer represents complete destruction of the epidermis and is the characteristic lesion of pressure sores or decubitus ulcers.