Basics & Morphology of Skin Lesions

Topics in this chapter

• Skin Lesion Morphology
• Primary Skin Lesions
• Secondary Skin Lesions
• Surface and Tissue Changes
• Vesicular and Urticarial Lesions
• Pigmented Lesions
• Eczema and Pruritus

Practice questions

1. Question 1Q-1E4579

   A 35-year-old male presents with a circumscribed, solid, elevated skin lesion measuring 8 mm in diameter on his back. Upon palpation, it involves both the epidermis and the dermis. What is the most appropriate primary morphological term for this lesion?

   1. A.Macule
   2. B.Papule
   3. C.Nodule
   4. D.Patch
   See the answer and solution
2. Question 2Q-7B5582

   A 45-year-old woman presents with multiple discrete, fluid-filled lesions on her trunk. Upon examination, the lesions contain clear fluid and measure 3 mm in diameter. Which of the following is the correct term for these primary lesions?

   1. A.Bulla
   2. B.Vesicle
   3. C.Pustule
   4. D.Wheal
   See the answer and solution
3. Question 3Q-0BE029

   A 28-year-old male develops sudden-onset, intensely pruritic, erythematous plaques on his extremities that resolve entirely within 24 hours without leaving any residual discoloration or scarring. This classic clinical behavior describes which of the following primary lesions?

   1. A.Nodule
   2. B.Wheal
   3. C.Plaque
   4. D.Tumor
   See the answer and solution
4. Question 4Q-A3E963

   A patient with chronic eczema presents with thickened skin characterized by an accentuation of normal skin markings, resulting in a 'washboard' or leathery appearance. Which of the following terms best describes this secondary skin lesion?

   1. A.Lichenification
   2. B.Excoriation
   3. C.Maceration
   4. D.Atrophy
   See the answer and solution
5. Question 5Q-FFA506

   A dermatological examination reveals a linear, hollowed-out, eroded area of the epidermis resulting from a patient forcibly scratching an intensely itchy bite. This specific secondary lesion is best termed:

   1. A.Fissure
   2. B.Ulcer
   3. C.Excoriation
   4. D.Erosion
   See the answer and solution