The incidence of an acute compartment syndrome (ACS) of the thigh is less than 1%. It is most common in the setting of muscle overuse or muscle injury, as well as secondary to trauma, such as a femoral fracture. We present a case of an ACS in a young, healthy, and semiprofessional athlete with normal coagulation who sustained an acute stress fracture of the distal femur. After the initial fracture osteosynthesis, the patient suffered from a compartment syndrome in the right anterior aspect of the distal thigh. Following rapid surgical fasciotomy, the case was uneventful, and he returned to his preinjury sport level without any neurological consequences. This case confirms that ACS in the thigh is rare, but mainly occurs in young males with a large muscle mass due to participation in various athletic programs. We hypothesize that constant muscle over-usage primes for a larger amount of contused and protruding muscle mass in the small femoral compartment. Hence, the fatigued muscle subjects the bone to an increased mechanical force resulting in an overloading process. This ensues the accumulation of femoral microfractures and primes for the occurrence of an increased rate of stress fractures and an ACS in the thigh.
Hinweise
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Introduction
The occurrence of an acute compartment syndrome (ACS) in the thigh is a rare observed phenomenon compared to the compartment syndrome in the arm or lower leg. It is most common in the setting of muscle overuse or muscle injury, as well as secondary to trauma, such as a femoral fracture [8, 14, 15, 19, 23].
In ACS, the interstitial pressure exceeds the capillary perfusion pressure resulting in a loss of perfusion. This further leads to consecutive cellular hypoxia and cellular death. The subsequent pathology includes tissue- and myonecrosis and neurological dysfunctions [26].
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We report a case of a semiprofessional young male athlete who presented with a femur stress fracture and developed a spontaneous compartment syndrome of the thigh post-surgical intervention.
Case Report
A healthy 39-year-old Caucasian male and semiprofessional marathon runner presented with sudden pain in the distal right thigh after jogging the day before. The patient arrived at the emergency department of a level-II tertiary-care center with the ambulance after collapsing due to intense pain. He participated in several marathons with consistent preparation and additionally engaged in strength-training sessions. The exercise routine included cardiovascular endurance runs three to four times a week between 10 to 25 km and strength training of the lower extremities. The patient stated that his participation in the last 42.2km long marathon was 3 months ago. The day before the accident, his muscles in the thigh were sore but he had no difficulty walking. That morning, the patient went about his usual routine and suddenly experienced pain in the right thigh with no ecchymosis or swelling. After taking a step, the patient collapsed on the floor due to pain and was not able to put weight on the right lower extremity. The patient had no relevant medical or surgical history and was not taking steroids.
On clinical evaluation a swelling was noted in the distal right thigh, and there were no initial vascular or neurologic loses in the peripheral leg. The X-ray (a.p. and lateral) of the right femur corresponded to a supracondylar, extraarticular femoral fracture with posterior dislocation (Fig 1, AO 33.A1). The patient was admitted to the trauma surgery medical floor for operative treatment.
Fig. 1
X-Ray of the right femur, anterior-posterior (left) and axial (right) view, showing a dislocated supracondylar femoral fracture (AO 33.A1)
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The next day, the patient underwent surgery under general anesthesia with osteosynthesis of the insufficiency fracture using a NCB 13 hole right femur plate (Zimmer) (Fig. 2). No drain was added because there was no strong bleeding, and the wound was closed with stitches. The pre- and postoperative laboratory results confirmed a stable hematocrit (33% post-surgically). The surgical intervention was not accompanied by any complication and the patient was transferred back in a cardiorespiratory stable condition to the trauma surgery medical floor.
Fig. 2
Intraoperative X-Ray of the right thigh, anterior-posterior (left) and axial (right) view
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During the surgical rounds in the morning, the patient presented with moderate pain, no vascular or neurological injuries, afebrile, no local or peripheral signs of infection, and no thigh circumference enlargement compared to the contralateral side.
Eight hours post-surgery an abrupt status change of the patient was observed: a tense anterior aspect of the right thigh with double the circumference compared to the contralateral side, decreased peripheral sensation to light touch with accompanying dysesthesia, a grade 2/5 extensor and flexor hallucis longus motor strength with no sensation to light touch at hallux level, and palpable pedal pulses. The patient presented with extreme pain in resting position.
Based on the clinical examination, the diagnosis of acute compartment syndrome in the thigh was made and the compartment pressure monitoring has been waived. The patient has been informed and was immediately taken to the operating room to undergo emergent right lateral thigh fasciotomy 48h after the primary diagnosed femoral stress fracture.
Intraoperatively, the original incision has been reopened and was extended proximally. All previous sutures were removed. The vastus lateralis muscle was very prominent and swollen but appeared to be pink, contractile, and viable. Above the in situ laying femur plate, no excessive hematoma or blood clot formation could be observed (Fig 3.). Over the open wounds extended NPWT (negative pressure wound therapy)-assisted dermatotraction was applied. Postoperatively, the patient had immediate pain relief and the neurological deficiencies resolved.
Fig. 3
Intraoperative photograph after compartment fasciotomy of the right thigh
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The patient was taken back to the operating room 2 days later to initiate wound closure with an elastic vessel loop applied to the wound for dermatotraction in a shoelace manner. Consistent tightening of the elastic vessel loops and skin mobilization led to a wound closure after an additional 7 days and the wound could be closed directly.
There was no complication in the postoperative course and the patient started to be mobilized with partial weight bearing exercises of 10–15kg and crutches. The total duration of the hospital stay was 22 days. The follow-up was carried out at 4, 6, and 24 weeks postoperative procedure for X-rays, afterwards yearly. Full weight bearing activities could be regained.
Discussion
Ojike et al. reviewed thigh compartment syndrome cases and noted that 90% of ACS occurred in the presence of a thigh trauma of which 50% were due to femur fractures [18].
The mean annual incidence of extremity compartment syndromes is 7.3/100,000 for men and 0.7/100,000 for women, which is consistent with previous reports that an ACS in the thigh occurs mostly in male gender and the occurrence is <1% [14, 28]. The reported mean age is between 30 and 40 years of the extremity compartment syndrome [14, 24]. The literature review reports that ACS in the thigh focuses 100% on male gender with a mean age of 22.8 years [3, 20, 21, 27]. The predisposition includes young, muscular, and athletic males and reflects our presented case [2, 6, 14].
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McQueen et al. [14] hypothesize that the high rate of incidence of ACS in young, athletic males reflects relatively large muscle volumes, while the compartment size (an inelastic fascial envelope) does not change after growth is complete. Thus, young men may have less space for swelling of the muscle after injury. Therefore, large muscle mass combined with an increased risk of trauma appear to be significant risk factors for ACS of the thigh [7, 10‐12, 22, 25].
Most authors advocate for surgical release within the classic 8-h window [3, 9, 13, 16‐18].
We describe a case of an acute compartment syndrome in the thigh with a principal stress fracture [5]. The fatigued muscle subjects the bone to an increasing force resulting in an overloading process with the accumulation of microfractures [1, 4].
To our knowledge, this is the first case report of a patient with an insufficiency fracture who developed a compartment syndrome. We hypothesize that the consistent over-usage and very prominent vastus lateralis muscle in our patient induced the supracondylar femur insufficiency fracture. It secondarily leads to a compartment syndrome due to the already contused and protruding muscle in the small compartment size. We cannot exclude that the compartment syndrome was due to delayed fracture stabilization.
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All clinicians, especially in the field of sport and trauma medicine, need to always consider the manifestation of a compartment syndrome in the thigh of a young male athlete and high muscle mass with great suspicion. The measurement of the intracompartment pressure is an adjunct to the examination. Athletes and semiprofessional athletes should also be counseled on the action to prevent stress fractures such as making training adjustments gradually and cross-training.
Declarations
Ethical Approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Human and Animal Rights and Informed Consent
This article does not contain any studies with animals performed by any of the authors.
Informed Consent
Informed consent was obtained from all individual participants included in the study. Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.
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Conflict of Interest
The authors declare no competing interests.
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
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