A 64-year-old outdoor worker presents with a 4-month history of a painful, firm nodule on the apex of his right helix. The pain is severe and sharp, characteristically provoked by sleeping on the affected side. Examination reveals a 4–5 mm dome-shaped, erythematous nodule with central hyperkeratosis and exquisite tenderness. Skin biopsy confirms chondrodermatitis nodularis helicis with cartilage degeneration and fibrinoid necrosis. Conservative management with topical antibiotics and analgesics has failed over 6 weeks. The structure marked **A** in the diagram represents the definitive management approach for this patient. Which of the following best describes why this approach is curative in CNH?
A. Removes the damaged cartilage and interrupts the ischemic necrosis cycle, achieving cure rates of 80–90%
B. Provides pain relief through local anesthesia but does not prevent recurrence
C. Eliminates bacterial colonization and prevents secondary infection of the lesion
D. Reduces local inflammation and improves microcirculation without addressing underlying cartilage pathology
Explanation
Why "Removes the damaged cartilage and interrupts the ischemic necrosis cycle, achieving cure rates of 80–90%" is right
The structure marked A — pressure offloading combined with surgical excision — is the definitive treatment for chondrodermatitis nodularis helicis when conservative therapy fails. Surgical excision with removal of the damaged underlying cartilage (via wedge excision or shave with curettage) directly addresses the pathophysiology: chronic pressure and ischemia leading to cartilage degeneration and fibrinoid necrosis. By excising the necrotic cartilage, the ischemic cycle is interrupted, preventing recurrence. Bolognia Dermatology confirms cure rates of 80–90% with this approach, making it the gold standard for definitive management in cases refractory to conservative therapy or with large/recurrent lesions.
Why each distractor is wrong
"Reduces local inflammation and improves microcirculation without addressing underlying cartilage pathology": This describes intralesional corticosteroids and topical nitroglycerin (options B and related conservative measures), which are first-line but have lower efficacy and higher recurrence rates when used alone. This patient has already failed conservative therapy.
"Provides pain relief through local anesthesia but does not prevent recurrence": Pain relief alone is insufficient; the lesion recurs if the damaged cartilage is not removed. This describes symptomatic management, not curative treatment.
"Eliminates bacterial colonization and prevents secondary infection of the lesion": Topical antibiotics (option D) address secondary infection, not the primary pathology. CNH is a sterile inflammatory and degenerative condition; infection is not the cause.
High-YieldNEET PG
Surgical excision with cartilage removal is curative in CNH because it interrupts the ischemic necrosis cycle; pressure offloading alone prevents recurrence but does not cure established disease.
Bolognia Dermatology, 5th ed.
Practice similar questions
Sign up free to access AI-powered MCQ practice with detailed explanations and adaptive learning.
