A 42-year-old male presents with a clean surgical wound on the forearm sustained during an elective procedure 5 days ago. On examination, the wound margins are well-approximated with minimal erythema, and the patient reports mild itching at the site. Histologically, which of the following processes is predominant at this stage of wound healing?

Explanation

## Wound Healing Phases Timeline Wound healing progresses through distinct, overlapping phases: | Phase | Timeline | Key Events | |-------|----------|------------| | **Hemostasis** | 0–minutes | Platelet aggregation, fibrin clot formation | | **Inflammatory** | Hours–3 days | Neutrophil infiltration, macrophage activation, debris removal | | **Proliferative** | 3 days–3 weeks | **Angiogenesis, collagen deposition, fibroblast activity, epithelialization** | | **Remodeling** | 3 weeks–2 years | Collagen cross-linking, scar maturation, tensile strength increase | ## Analysis of Day 5 At **5 days post-injury**, the wound is firmly in the **proliferative phase**: - **Hemostasis** (options B) occurred within minutes—already complete. - **Inflammatory phase** (option C) peaked at 24–48 hours; by day 5, inflammatory cells are declining. - **Proliferative phase** (option A) is now dominant: fibroblasts are actively synthesizing collagen (Types I and III), and new blood vessels (angiogenesis) are forming to restore perfusion. - **Remodeling phase** (option D) does not begin until week 3 onwards. **Key Point:** The mild itching reported is consistent with active collagen deposition and fibroblast proliferation, a hallmark of the proliferative phase. **Clinical Pearl:** By day 5, the wound has approximately 5% of its final tensile strength; collagen deposition is the rate-limiting step for strength gain.