Abnormal rapid proliferation of Epidermal cells causes :

Appeared in: IGNOU PB. Bsc. Nsg. Entrance-2025

Explanation

Psoriasis is a chronic inflammatory skin condition defined by the hyperproliferation of keratinocytes (epidermal cells).
The normal cell cycle for keratinocytes is about 28-30 days, but in psoriasis, this is accelerated to just 3-5 days.
This rapid turnover leads to an accumulation of immature cells on the skin surface, forming the characteristic thick, red, and scaly plaques.
The underlying mechanism involves a complex interplay between genetic factors and immune system dysfunction, leading to inflammation and cellular proliferation.

Option B: Pemphigus is an autoimmune blistering disease. The primary pathology is acantholysis (separation of epidermal cells), not proliferation.
Option C: Steven-Johnson syndrome is a severe hypersensitivity reaction leading to widespread epidermal necrosis (cell death) and detachment, which is the opposite of proliferation.
Option D: Erysipelas is an acute bacterial infection of the upper dermis and lymphatics. It is an inflammatory response to an external pathogen, not an intrinsic disorder of cell growth.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology of Common Dermatological Disorders as background academic context rather than a clinical decision trigger.
Understanding the pathophysiology of psoriasis is crucial for nurses to educate patients about the chronic nature of the disease and the importance of adherence to long-term treatment plans.
Nurses play a key role in helping patients identify and manage triggers (e.g., stress, skin trauma, infections) that can exacerbate psoriasis, empowering them to take control of their condition.
What if? If a patient with psoriasis develops a high fever and widespread pustules on top of their red skin, the nurse must recognize this as a potential sign of generalized pustular psoriasis, a medical emergency requiring immediate intervention, rather than a typical plaque psoriasis flare.

How to Approach the Question

First, identify the core concept in the question stem: 'abnormal rapid proliferation of Epidermal cells'. This points to a disorder of cell growth.
Next, analyze each option based on its known pathophysiology.
Recall or deduce that Psoriasis is the classic example of a hyperproliferative skin disorder.
Evaluate the other options: Pemphigus is autoimmune (blistering), Steven-Johnson syndrome is a hypersensitivity reaction (necrosis), and Erysipelas is an infection (inflammation).
By matching the key process from the stem to the disease mechanisms, you can confidently select the correct answer.

Concept Tested & Keywords

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E6 Medicine Harrison 22e Part 1 pp. 434-436, 433-435

Practise the full IGNOU PB. Bsc. Nsg. Entrance-2025

Attempt every question from this paper in a timed mock, then review the full solution for each one.