The correct option correctly pairs each clinical sign with its corresponding dermatological condition based on the underlying pathophysiology.
Positive Nikolsky sign (A) is classic for Pemphigus vulgaris (1) due to autoantibody-mediated loss of keratinocyte adhesion (acantholysis).
Pseudo-Nikolsky sign (B) is seen in Stevens-Johnson syndrome (2), where epidermal necrosis allows the skin to be sloughed off with pressure.
False Nikolsky sign (C), or Asboe-Hansen sign, involves the extension of a blister's margin under pressure, which is characteristic of the tense bullae in Bullous pemphigoid (3).
Cerebriform tongue (D) is a distinctive feature of Pemphigus vegetans (4), where vegetating lesions form deep grooves on the tongue.
Why Other Options Were Wrong
Option A: This option incorrectly matches Positive Nikolsky sign with Stevens-Johnson syndrome and Pseudo-Nikolsky sign with Pemphigus vulgaris.
Option C: This option incorrectly swaps the conditions for Pseudo-Nikolsky and False Nikolsky signs. Pseudo-Nikolsky is associated with SJS, and False Nikolsky is associated with Bullous Pemphigoid.
Option D: This option incorrectly scrambles all the matches.
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Clinical Relevance
Nursing practice connection: Knowing Matching specific dermatological signs to their associated autoimmune and hypersensitivity skin disorders helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Accurate identification of these signs is crucial for nurses in the differential diagnosis of potentially life-threatening blistering diseases.
A nurse observing a positive Nikolsky sign must initiate precautions to prevent further skin damage, such as gentle handling, avoiding friction, and using non-adherent dressings.
Recognizing these signs helps in prompt diagnosis and initiation of appropriate therapy (e.g., corticosteroids, immunosuppressants), which can significantly improve patient outcomes.
How to Approach the Question
This is a 'Match the Following' question that tests your knowledge of specific clinical signs in dermatology.
First, identify the most well-known and definitive pairings. For example, the 'Positive Nikolsky sign' is a classic, textbook association with 'Pemphigus vulgaris'. This establishes A-1.
Next, address the other pairs. 'Cerebriform tongue' is a very specific and unusual sign strongly linked to 'Pemphigus vegetans'. This establishes D-4.
Now, differentiate between 'Pseudo-Nikolsky' and 'False Nikolsky'. Recall that 'pseudo' implies a different mechanism (necrosis in SJS), while 'false' refers to the extension of an existing blister (tense bullae in Bullous Pemphigoid). This gives you B-2 and C-3.
Combine your matches: A-1, B-2, C-3, D-4. Look for the option that contains this exact combination.
Concept Tested & Keywords
Concept Tested: Matching specific dermatological signs to their associated autoimmune and hypersensitivity skin disorders.