5. Principally, the repair component of healing involves which of the

5. Principally, the repair component of healing involves which of the following? A. Formation of new blood vessels B. Removal of cellular debris C. Formation of supporting connective tissue D. Parenchymal cells regeneration 6. This statement best explains the concept of chronic inflammation. A. Inflammatory response after acute inflammation B. This is a result of the failure of the acute inflammatory response C. Immune response that is acquired D. Persistence of the stimulus with prolonged inflammation and repair 7. A 20-year-old boy was brought to the ER because of a large gaping wound at his right upper extremity. The sutures were removed seven days later. Wound healing continued after 2 months, however the site developed into a thick, raised scar. Which of the following best describes the condition above? A. Dehiscence C. Regeneration B. Hypertrophic scar D. Keloid 8. A 6-year-old female was seen at the ER complaining of severe right lower quadrant pain of ten hours duration accompanied by vomiting and tenderness. An appendectomy was performed and revealed a congested appendix with thin creamy exudates on the serosal surface. What morphologic pattern of inflammation is seen in this organ? A. Granulomatous inflammation B. Fibrinous inflammation C. Suppurative inflammation D. Serous inflammation

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The retrieval was limited, but these are well-established pathology concepts. Here are the answers with full explanations:

Question 5 — Answer: C. Formation of supporting connective tissue

Healing has two distinct components:

Regeneration: replacement of injured cells with new parenchymal cells of the same type (restores normal architecture)
Repair: replacement of injured tissue with fibrous/connective tissue (scar formation)

Repair is the principal response when damage is too extensive for regeneration, or when the tissue involved is non-labile (cannot regenerate). It involves fibroblast proliferation, collagen deposition, and formation of a fibrous scar — i.e., supporting connective tissue.

Formation of new blood vessels (A) = angiogenesis, which supports the repair process but is not the principal component itself
Removal of cellular debris (B) = part of the inflammatory phase, not repair
Parenchymal cell regeneration (D) = regeneration, the alternative pathway to repair

Question 6 — Answer: D. Persistence of the stimulus with prolonged inflammation and repair

Chronic inflammation is defined as prolonged inflammation (weeks to months) in which inflammation, tissue injury, and attempts at healing all proceed simultaneously. It occurs when the injurious stimulus persists and cannot be eliminated (e.g., persistent microbes, autoimmune reactions, prolonged toxic exposure).

Option A is incorrect: chronic inflammation does not always follow acute inflammation — it can occur de novo
Option B is incorrect: it is not simply a failure of acute inflammation; it reflects a distinct biological response
Option C is incorrect: while immune mechanisms are involved, chronic inflammation is not synonymous with acquired immunity

Question 7 — Answer: D. Keloid

Key clues:

Feature	Hypertrophic Scar	Keloid
Extends beyond wound margins	No	Yes
Raised, thick scar	Yes	Yes
Regresses over time	Often yes	No
Recurs after excision	Less likely	Highly likely
Common in dark-skinned individuals	Less so	More common

The wound healed but then produced a thick, raised scar — the key distinguishing feature favoring keloid is that the question implies excessive, ongoing scar growth beyond normal healing. A keloid extends beyond the original wound boundaries and does not regress spontaneously.

Dehiscence (A) = wound reopening/separation, not applicable here
Regeneration (C) = restoration of normal tissue, not a scar
Hypertrophic scar (B) = raised but stays within wound margins and may regress; keloid is the better answer given the context of excessive scar formation

Question 8 — Answer: C. Suppurative (Purulent) Inflammation

The clinical and pathologic findings are classic for suppurative (purulent) inflammation:

Congested appendix — vascular engorgement
Thin creamy exudates on the serosal surface — this describes pus (neutrophil-rich exudate)
Context: acute appendicitis with bacterial infection

Suppurative inflammation is characterized by large amounts of purulent exudate (pus) consisting of neutrophils, necrotic cells, and edema fluid, produced by pyogenic (pus-forming) bacteria.

Pattern	Key Feature
Serous	Thin, watery fluid; no cells; e.g., early viral pleuritis
Fibrinous	Fibrin-rich exudate; e.g., fibrinous pericarditis ("bread and butter")
Suppurative/Purulent	Pus (neutrophils + necrosis); e.g., appendicitis, abscess
Granulomatous	Macrophage aggregates (granulomas); e.g., TB, sarcoidosis

The "thin creamy exudates" = pus → suppurative inflammation.

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