Compartment syndrome is a serious and limb-threatening condition caused by increased pressure within a closed osseofascial compartment. This elevated pressure compromises local tissue perfusion, leading to ischemia, irreversible muscle necrosis, and nerve damage if not promptly treated.  Though traditionally associated with long bone fractures, especially of the tibia, it can also occur after isolated soft tissue trauma like crush injuries, contusions, or reperfusion injuries—without any associated bony injury [1]. The inelastic nature of fascial boundaries amplifies the effects of even minor bleeding or edema. If the intracompartmental pressure surpasses the capillary perfusion threshold, ischemia ensues. Prompt clinical diagnosis and urgent decompression via fasciotomy are crucial to prevent complications such as Volkmann’s ischemic contracture or limb loss [2].

CASE PRESENTATION

A 23-year-old male presented to the emergency department with complaints of severe pain and swelling in the left leg following an alleged history of road traffic accident. The patient complained of pain; which was disproportionate to the apparent injury and was not relieved with analgesics. He was unable to bear weight on the affected limb. On examination, the left calf was tense and tender, particularly over the medial aspect. Passive stretch pain was markedly positive. Peripheral pulses in limb were feeble. There were no open wounds or signs of fracture. X-ray of the left leg revealed no fractures (Figure A). Ultrasound surface scan showed findings which were suggestive of intramuscular hematoma in the medial head of the gastrocnemius muscle.

Diagnosis: The clinical diagnosis of impending compartment syndrome was made based on:

• Disproportionate pain
• Tense compartment
• Passive stretch pain
• Feeble distal pulses
• Imaging showing intramuscular hematoma

Treatment and Outcome: The patient underwent emergency fasciotomy under spinal anesthesia. Two incisions were made on the medial and lateral aspects of the leg, each measuring approximately 10 cm in length releasing all the 4 compartments. Intraoperative findings included edematous and contused muscle without necrosis, blood clots were evacuated from the medial head of the gastrocnemius muscle. After release the compartments were left open and cuticell dressing was done. Double antibiotics were started and daily dressing, enzymes and limb elevation were given. Pulses returned to normal within 24 hours. The muscles appeared healthy on Post op day 4 and decision was taken to post the patient for SSG coverage of the fasciotomy sites.

A B C D E

1. A) Pre-operative X-ray; B) Incision was made over the medial and lateral aspects of the leg; C) Compartment opened; D) Evacuation of blood clots from medial head of gastrocnemius muscle; E) Post Operative Day 2 Dressing

DISCUSSION

This case shows an uncommon presentation of compartment syndrome in the absence of fracture. Intramuscular bleeding following blunt trauma can elevate compartment pressures, leading to neurovascular compromise [3,4]. Early clinical signs such as pain out of proportion and stretch pain are crucial for diagnosis [5]. Imaging may aid but should not delay surgical intervention.

Delayed diagnosis of compartment syndrome can lead to irreversible ischemic injury to muscles and nerves, often within 6 to 8 hours of onset. The absence of fracture can lead clinicians to underestimate the severity of soft tissue damage, resulting in missed or delayed diagnosis. In the absence of fracture, soft tissue injuries such as muscle contusions and vascular compromise due to blunt trauma can generate sufficient pressure to precipitate compartment syndrome [6]. In such scenarios, reliance on compartment pressure measurements alone may be misleading, particularly when pain is masked by analgesics.

Furthermore, this case underlines the utility of bedside ultrasound in identifying hematoma and guiding clinical suspicion [7]. Though advanced imaging such as MRI can visualize compartmental edema, its availability and time constraints make it unsuitable for acute decision-making in emergency settings. A high index of suspicion, along with serial clinical assessments, remains the gold standard for diagnosis in atypical cases.

This report contributes to the limited literature on compartment syndrome without bony injury and encourages clinicians to maintain vigilance in similar presentations. Emergency care teams should be trained to detect subtle signs and initiate fasciotomy even in non-classical presentations.

CONCLUSION

Impending compartment syndrome can occur even in the absence of a fracture, and this case serves as a timely reminder that clinical judgment must always supersede radiological findings. The absence of bony injury should not lull clinicians into a false sense of security when classical symptoms like pain out of proportion, tense swelling, and passive stretch pain are present. Prompt recognition, coupled with a low threshold for fasciotomy, is critical in salvaging limb function and avoiding devastating complications. Through this case, we underscore the importance of maintaining a high index of suspicion in blunt trauma cases—where the threat may be hidden beneath an intact bone but brewing within a confined compartment. Early intervention remains the key to transforming a potential disaster into a limb-saving success story. High suspicion and immediate decompression are key to preserving limb function in cases of compartment syndrome without fracture.

REFERENCES

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