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NEET MDS Quiz - Practice Test
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pathology - 3 Questions

1
Pathology
The antecedents of Sq. cell carcinoma is/are:
1. Leukoplakia
2. Solar keratosis
3. Margins of long standing draining sinuses
4. All of the above

📝 Explanation:

All of the listed conditions (leukoplakia, solar keratosis, and margins of long-standing draining sinuses) are known precursors to squamous cell carcinoma.

2
Pathology

Most common areas of body susceptible to carcinomas:
1. Head and neck
2. Back
3. Pelvic and urogenital
4. Extremities

📝 Explanation:

Head and Neck: The head and neck region includes various structures such as the oral cavity, nasal cavity, pharynx, larynx, and the salivary glands. This region is highly susceptible to carcinomas due to the presence of mucosal surfaces exposed to potential carcinogens. Common types of head and neck carcinomas include:

- Oral Squamous Cell Carcinoma: This is the most common form of head and neck cancer, typically occurring on the tongue, lips, oral cavity, and oropharynx. Risk factors include tobacco use (smoking and smokeless), alcohol consumption, and human papillomavirus (HPV) infection.
- Nasopharyngeal Carcinoma: This cancer arises from the nasopharynx and is often associated with environmental factors such as the Epstein-Barr virus (EBV) infection and dietary habits.
- Laryngeal Carcinoma: Cancer of the larynx (voice box) is often linked to smoking and excessive alcohol intake.

3
Pathology

A wound which Was sutured attains:
1. Normal tensile strength after 6 months
2. 70-80% of tensile strength of unwounded skin which may persist for life
3. 100% tensile strength of unwounded skin after 9 months
4. 100% of tensile strength can be achieved if sutures were of nylon or vicryl

📝 Explanation:

The newly formed collagen in the scar tissue is arranged differently compared to the organized collagen fibers in the unwounded skin, leading to a weaker structure. The 70-80% tensile strength is typically what is seen in well-healed sutured wounds. This remaining deficit is because scar tissue is less elastic and more prone to dehiscence (reopening) under tension compared to normal skin.

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