Hair and Nail Disorders Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Hair and Nail Disorders. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Hair and Nail Disorders Indian Medical PG Question 1: Finasteride is classified as a:
- A. 5-alpha reductase inhibitor (Correct Answer)
- B. Phosphodiesterase inhibitor
- C. Alpha-1 blocker
- D. Androgen receptor antagonist
Hair and Nail Disorders Explanation: ### ***5-alpha reductase inhibitor***
- **Finasteride** specifically inhibits the enzyme **5-alpha reductase**, preventing the conversion of **testosterone** to **dihydrotestosterone (DHT)** [2], [4].
- This reduction in DHT is clinically useful for treating conditions like **benign prostatic hyperplasia (BPH)** and **androgenetic alopecia** [4].
### *Phosphodiesterase inhibitor*
- **Phosphodiesterase inhibitors** (e.g., sildenafil) typically work by increasing levels of **cyclic GMP**, leading to **vasodilation** and are used for **erectile dysfunction** [3].
- Their mechanism of action is distinct from finasteride's effect on **hormone metabolism**.
### *Alpha-1 blocker*
- **Alpha-1 blockers** (e.g., tamsulosin) primarily relax **smooth muscle** in the prostate and bladder neck, improving **urine flow** in BPH [3], [5].
- They act on **adrenergic receptors** and do not affect **hormone synthesis** or **metabolism** [3].
### *Androgen receptor antagonist*
- **Androgen receptor antagonists** (e.g., flutamide) directly block the binding of **androgens** (like testosterone and DHT) to their receptors [1], [4].
- While they also affect androgen action, their mechanism is different from finasteride's **enzyme inhibition** [4].
Hair and Nail Disorders Indian Medical PG Question 2: A patient presents with compulsive hair pulling resulting in irregular patchy hair loss. What is the most likely diagnosis?
- A. Trichotillomania (Correct Answer)
- B. Alopecia areata
- C. Telogen effluvium
- D. Tinea infection
Hair and Nail Disorders Explanation: ***Trichotillomania***
- This condition is characterized by **recurrent, irresistible urges to pull out hair**, typically resulting in **noticeable hair loss**.
- The resulting patchy hair loss is often **irregular** and can occur in various areas, aligning with the patient's presentation.
*Alopecia areata*
- This is an **autoimmune condition** that causes smooth, **well-demarcated patches of hair loss**, not typically associated with compulsive pulling.
- It usually presents with a sudden onset of hair loss without any preceding trauma or manipulation.
*Telogen effluvium*
- This condition involves **widespread hair thinning** due to a disturbance in the hair growth cycle, often triggered by stress or illness.
- It does not involve compulsive hair pulling and typically results in increased hair shedding rather than patchy hair loss.
*Tinea infection*
- Also known as **ringworm**, this is a fungal infection that can cause **scaly, itchy patches of hair loss**, sometimes with inflammation and broken hairs.
- While it can cause patchy hair loss, it is characterized by dermatological signs of infection (e.g., scaling, erythema) and not compulsive hair pulling.
Hair and Nail Disorders Indian Medical PG Question 3: HAIR-AN syndrome consists of which of the following?
- A. Acanthosis nigricans
- B. Insulin resistance
- C. Hyperandrogenism
- D. All of the options (Correct Answer)
Hair and Nail Disorders Explanation: ***All of the options***
- HAIR-AN syndrome is an acronym representing the combination of **HyperAndrogenism**, **Insulin Resistance**, and **Acanthosis Nigricans**.
- This syndrome is often associated with **severe hyperinsulinemia** and is considered a severe form of polycystic ovarian syndrome (PCOS) [1].
*Acanthosis nigricans*
- While **acanthosis nigricans** is a key component of HAIR-AN syndrome, it does not, by itself, define the entire syndrome.
- This condition is characterized by **darkening and thickening of the skin**, particularly in body folds, and is a marker of insulin resistance.
*Insulin resistance*
- **Insulin resistance** is central to HAIR-AN syndrome, driving many of its metabolic and dermatological manifestations.
- However, the definition of HAIR-AN syndrome requires the presence of hyperandrogenism and acanthosis nigricans in addition to insulin resistance to be complete.
*Hyperandrogenism*
- **Hyperandrogenism**, characterized by elevated androgen levels leading to symptoms like hirsutism and acne, is a critical feature of HAIR-AN syndrome [1].
- Similar to the other components, hyperandrogenism alone does not constitute the full syndrome, which necessitates the presence of insulin resistance and acanthosis nigricans.
Hair and Nail Disorders Indian Medical PG Question 4: Tics, hair pulling, and nail biting behaviors are best treated with?
- A. Behavior therapy (Correct Answer)
- B. Psychodynamic therapy
- C. ECT
- D. Medications
Hair and Nail Disorders Explanation: ***Behavior therapy***
- **Behavior therapy**, particularly **Habit Reversal Training (HRT)**, is the first-line and most effective treatment for tics, hair pulling (trichotillomania), and nail biting (onychophagia).
- It involves teaching individuals to identify triggers and recognize urges, and then substituting the undesirable behavior with a competing response.
*Psychodynamic therapy*
- This therapy focuses on uncovering **unconscious conflicts** and past experiences that may contribute to symptoms.
- While it can be helpful for some psychological issues, it is generally **less effective** for directly addressing specific behavioral symptoms like tics or body-focused repetitive behaviors.
*ECT*
- **Electroconvulsive therapy (ECT)** is a powerful somatic treatment primarily used for severe mental illnesses like **treatment-resistant depression** or catatonia.
- It is **not indicated** for tics, hair pulling, or nail biting due to the high risks and lack of evidence for its efficacy in these conditions.
*Medications*
- While some medications (e.g., **antipsychotics** for severe tics, **SSRIs** for co-occurring anxiety/OCD) can be used as an adjunct, **behavioral therapy** is generally more effective and the first-line approach for these specific behaviors.
- Medications alone rarely resolve these behaviors completely without behavioral intervention, and they often come with side effects.
Hair and Nail Disorders Indian Medical PG Question 5: Which of the following statements is incorrect regarding nail changes in various conditions?
- A. Onycholysis is seen in Psoriasis.
- B. Mees lines are indicative of Arsenic poisoning.
- C. Pterygium of nails is associated with Lichen Planus.
- D. Koilonychia is associated with Vitamin B12 deficiency. (Correct Answer)
Hair and Nail Disorders Explanation: ***Koilonychia is associated with Vitamin B12 deficiency.***
- **Koilonychia**, or "spoon nails," is primarily associated with **iron deficiency anemia**, not Vitamin B12 deficiency.
- In Koilonychia, the nails become **thin, brittle**, and concave in shape.
*Onycholysis is seen in Psoriasis.*
- **Onycholysis** refers to the separation of the nail plate from the nail bed, which is a common nail finding in **psoriasis**.
- Other nail changes in psoriasis include **pitting**, oil spots, and subungual hyperkeratosis.
*Mees lines are indicative of Arsenic poisoning.*
- **Mees lines** are transverse white lines or bands that appear across the nail plate, characteristic of severe illness or poisoning.
- They are classically associated with **arsenic poisoning**, but can also be seen in other conditions like thallium poisoning or kidney failure.
*Pterygium of nails is associated with Lichen Planus.*
- **Pterygium unguis** involves the forward growth of the proximal nail fold (cuticle) onto the nail plate, leading to fusion.
- It is a prominent and often distinguishing feature of **lichen planus** affecting the nails, which can lead to permanent nail deformity or loss.
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