Background: Penetrating ballistic trauma to the popliteal fossa carries a severe risk of limb loss and permanent functional disability due to the tight anatomical packing of the popliteal artery, popliteal vein, tibial nerve, and common peroneal nerve. Standard trauma management guidelines advocate noninvasive surveillance or computed tomography angiography (CTA) in hemodynamically stable patients lacking "hard signs" of vascular injury (ankle-brachial index > 0.9). However, standard nonoperative protocols do not routinely account for acute mechanical joint threats or deep-space macro-contamination. Case Presentation: A 45-year-old male presented 45 minutes following a low-velocity gunshot wound to the left popliteal fossa. Initial trauma evaluation demonstrated no evidence of vascular compromise: distal pulses were symmetrical and easily palpable, the baseline ankle-brachial index was normal (ABI = 1.0), and bedside Doppler ultrasound confirmed triphasic distal flow within 30 minutes of presentation. Complete neurological assessment demonstrated intact motor and sensory function across both the tibial and common peroneal nerve distributions. Plain radiographs confirmed a retained metallic projectile within the popliteal space without gross fracture. Despite the absence of hard vascular signs, the clinical decision was made to proceed directly to emergency surgical exploration via a posterior approach 90 minutes post-arrival. This decision was driven by the high risk of deep ballistic tract contamination and potential mechanical joint compromise, with an on-call vascular surgery team placed on active standby.

Results: Direct intraoperative visualization confirmed total structural preservation of the popliteal artery, popliteal vein, tibial nerve, and common peroneal nerve. The projectile was successfully extracted from adjacent to the posterior femoral cortex, followed by thorough irrigation and debridement. Postoperative CT revealed a small posterior femoral cortical defect without intra-articular extension. Postoperative CTA and MRI confirmed full vascular patency without intimal flaps, pseudoaneurysms, or occult nerve sheath disruption. At six-month follow-up, the patient maintained full knee range of motion, normal unassisted ambulation, and no delayed vascular or neurological sequelae.

Conclusion: Ballistic trauma traversing the popliteal fossa can, in rare micro-trajectory anomalies, completely spare critical neurovascular structures. This case demonstrates that immediate surgical exploration remains a safe and effective clinical strategy in hemodynamically stable proximity injuries when deep-space contamination or mechanical joint compromise threatens overall limb salvage.

Divya Ravikumar has completed her MBBS degree from Azerbaijan Medical University. She is currently completing her internship at Medeor Hospital (Burjeel Holdings), Abu Dhabi. Demonstrating an early commitment to clinical excellence and academic scholarship, she has authored and peer-reviewed research spanning pediatric surgery, orthopedics, cardiology, and perioperative sustainability, including work published in the Cureus Journal of Medical Science. Her professional work bridges patient-centered clinical care, evidence-based research, and sustainable practices in surgical healthcare.