Necessity of secondary Syme amputation of the foot after severely destroyed hindfoot injury due to suicidal jump from height in a psychiatric patient: Case presentation and brief review of literature

A 44-year-old obese female (body mass index 37.2 kg/m2) presented with open severely destroyed injuries of her both hindfoots after a suicidal jump from approximately 4 m height out of her private balcony. There was a longstanding history of a psychiatric disorder (schizophrenia) treated by psychopharmaca. The left foot showed an open Gustilo-Anderson II hindfoot injury at the lateral aspect of calcaneus, and three-dimensional computed tomography (3D CT) revealed a highly comminuted hindfoot fracture-dislocation injury involving the calcaneus, the subtalar joint, and the Chopart joint (Figure 1A). The right foot showed an open Gustilo-Anderson IIIB hindfoot injury at the medial-plantar aspect of calcaneus, and 3D CT revealed a highly comminuted calacaneus fracture (Figure 1B).

Necessity of secondary Syme amputation of the foot after severely destroyed hindfoot injury due to suicidal jump from height in a psychiatric patient: Case presentation and brief review of literature Case presentation A 44-year-old obese female (body mass index 37.2 kg/m 2 ) presented with open severely destroyed injuries of her both hindfoots after a suicidal jump from approximately 4 m height out of her private balcony. There was a longstanding history of a psychiatric disorder (schizophrenia) treated by psychopharmaca. The left foot showed an open Gustilo-Anderson II hindfoot injury at the lateral aspect of calcaneus, and three-dimensional computed tomography (3D CT) revealed a highly comminuted hindfoot fracture-dislocation injury involving the calcaneus, the subtalar joint, and the Chopart joint ( Figure 1A). The right foot showed an open Gustilo-Anderson IIIB hindfoot injury at the medial-plantar aspect of calcaneus, and 3D CT revealed a highly comminuted calacaneus fracture ( Figure 1B).
Both injuries were initially treated by closed reduction and external fixation (CREF) accompanied with percutaneous pinning, negative-pressure vacuum assisted closure (VAC) therapy, and intravenous application of antibiotics (cefuroxime). Against our strict recommendations not to load her both legs, the patient mobilized herself with full-weight bearing and went away several times from our hospital and so nearly all pins of external and internal fixations were broken. As a consequence, the overall pins for external and internal fixation of both foots had to be removed 4 weeks after primary surgery, resulting in severe posttraumatic flat foot on both sites based on pronounced bony destruction and fragment dislocation and diastases of the calcaneus bones accompanied with re-dislocation in her left Chopart joint (Figures 2A and 3A). After intermittent negativepressure VAC therapy, a secondary wound closure of her left open II injury could be achieved without additional soft tissue coverage 3 weeks after injury. For closure of her right open IIIB injury, wound coverage with the use of a distally pedicled neurofasciocutaneous sural artery flap (DPNFCSAF) was performed 1 week after removal of the pins. For this purpose, the pedicle of the flap was primarily covered by a synthetic skin substitute (Epigard) at its 160° pivot point extending up distally to the flap, and secondarily covered by split-thickness skin grafts 1 week later that was associated with an uneventful wound healing (i.e. flap survival) ( Figures 2B-C).
At the left foot, the further course after secondary wound closure of her open II injury without the need of coverage was complicated by development of severe osteomylitis of the hindfoot involving the distal tibia metaphysis presented with marked swelling of the overall foot and an infectious fistula at the lateral aspect of calcaneus (Staphylococcus aureus) ( Figures 3A-B). Hence, the Syme amputation was detected and performed by us that was associated with an uneventful course ( Figures 3C-F). Noted, that the pulse of posterior tibial artery was palpable before amputation. Hindfoot osteomyelitis involving the distal tibia metaphysis was confirmed by histological examination. Six months after amputation, the patient could be mobilized with full-weight bearing of her both legs with the use of an individually customized length balancing prosthetic foot device for the Syme stump (Moritz Klinik Bad Klosterlausnitz / Germany, Chief at this time: Dr. med. Uwe Neumann / Senior Chief: PD Dr. med. habil. Lutz Brückner) ( Figure 3G). At this time, the Syme amputation of her right painful posttraumatic flat foot was wished by the patient as well, but we have not positioned ourselves for the time being in addition. After that, the patient did not return in our hospital again. Falls or jumps from height are high-energy injuries associated with amount of polytraumatized patients up to 65% ( Figures 4A-B) and a lethality up to 12.5% [1,2]. Jumps from heights are the most common method for suicide in the western population with a relative portion ranging from 44.1% to 45.8%, followed by hanging with a relative portion of 40.3%, and in 97.7% of cases the suicides were committed outside a hospital [2,3]. In 45.5% of cases with suicidal jumps, the psychiatric patients (schizophrenics, endogenous depressives) were formerly treated stationary in a hospital, and 12.5% of the psychiatric patients were addicted to opiates and hallucinogenics [2,3]. Furthermore, it is  noted that the numerical ratio between natural deaths due to a cancer and the suicides of cancer patients is about 1:1,000 [3].
Regarding to the injury pattern of the lower extremities and head after falls or jumps from height there are some differences, the amount after accidental falls is reported to be 23% and it raises up significantly to 65% after suicidal jumps for the lower extremities, whereas head injuries significantly decrease from 54% after accidental falls to 26% after suicidal jumps [4]. In 57.3% of cases with injuries of the lower extremities after suicidal jumps, the distal lower leg, ankle and foot are concerned [2]. Falls from height higher than 3 m and attempted suicide are associated with a higher incidence of injuries of the ankle and foot than traffic accidents, and the amount of high-energy fracture- dislocation injuries involving the Chopart joint is with a relative portion of 55% much more higher than pure Chopart joint dislocation with a relative portion of 25% and fracture-dislocation injuries involving both the Chopart and Lisfranc joints with a relative portion of 20% [5,6]. It is important to know that high-energy injuries of the ankle and foot are generally associated with severe closed or open soft tissue injuries [5][6][7][8]. Highly comminuted injuries of the upper extremity in patients with high-energy traumata without concomitant injuries of the ankle and foot were observed 33.3% of cases and it raises up to 43.5% of cases with concomitant injuries of the ankle and foot, and it has been also observed in 77.1% of cases after suicidal jumps mostly involving the distal forearm and hand ( Figure 5A) with a relative portion of 40.5% followed by injuries of the elbow (Figures 6A and 7A) with a relative portion of 29,7% [2,5]. Primary surgical amputation of severely destroyed injuries of the upper and lower extremities are absolutely indicated in critically ill polytraumatized patients (i.e. life before limb) when the injured extremity showing complete ischemia such as in case of a subtotal amputation [6,9,10].
Highly comminuted fractures or fracture-dislocation injuries with concomitant severe closed or open soft tissue injuries especially at the critical distal third of lower leg, ankle and hindfoot where the bradytrophe bony tissue is not surrounded by well vascularized defending muscles ( Figure 8A) represent a challenging therapeutic problem [11]. In general, surgical treatment typically involves the three-stage management both at the upper and lower extremities without any differences that is based on the fundamental knowledge by Gustilo and Anderson in the late 70th's to prevent bony infection [7,[12][13][14][15]. The first stage includes CREF, first applied in 1843 by Malgaigne and later modified in 1902 by Lambotte, to restore length of bone and alignment of its axis, and joint congruency by ligamentotaxis with or without additional percutaneous pinning ( Figures 4A, 5B, 6A, 7B and 8B) [16][17][18][19]. If a compartment syndrome exists, surgical fasciotomy must be performed [20]. If an open soft tissue injury is present, CREF must be accompanied by wound debridement and negativepressure VAC therapy. Negative-pressure VAC therapy before soft tissue coverage provides a sterile and controlled environment that  can lessen the duration of wound healing, promotes better capillary circulation, and decreases the bacterial load [21]. It must be noted that a closed soft tissue injury after fall or jump from height can be associated in 33% of cases with a subcutaneous décollement as the result of applied tangential or orthogonal forces onto a small, solid and flat surface, and it is statistically more common in accidental falls than in suicidal jumps or in unclarified causes of fall [8]. The key stone in surgical management is the second stage that includes coverage of soft tissue defects [7,[22][23][24][25][26][27][28]. The use of the DPNFCSAF is one option for coverage of wounds around the ankle and heel, but not free of any  complications mostly based on venous congestion [29][30][31][32]. One option to avoid venous congestion, such as in our presented case, is that the pedicle of flap is primarily covered by a synthetic skin substitute at its pivot point extending up distally to the flap, and secondarily covered by split-thickness skin grafts [32,33]. The third stage includes the motion-preserving O(C)RIF ( Figures 4B, 6B and 8C-E) with or without the necessity for reconstruction of bony defects utilizing bone grafts [23,24,[34][35][36]. When the injury is finally resulted in an irreparable damage of articular surface (i.e. posttraumatic osteoarthritis), the salvage options (i.e. "fourth stage of management") are joint replacement, joint arthrodesis with or without required correction of misalignment ( Figures 9A-C), or amputation when limb salvage procedures become not possible [19,28,[36][37][38][39][40][41][42][43][44][45]. A reasonable option to O(C)RIF for highly comminuted fractures can be primary motion preserving total or partial joint replacement at the lower and upper extremities for surgeons who are familiar with its use (Figures 5C-D and 7C-E) [46][47][48][49][50][51][52][53]. Bone lengthening (i.e. callus distraction), nerve and tendon repair, treatment of secondary soft tissue complications with or without exposure of osteosynthesis plates or endoprostheses with or without infection, treatment of other trauma-or surgeryrelated complications such as malignancy or failed ORIF, and silicone epitheses can become necessary to restore or improve statics, function, and aesthetics in the further course ( Figures 10A-B) [10, 37,[54][55][56][57][58][59][60]. It must be noted that surgical amputation after complication of minor trauma or surgery regardless any problems with the wound healing can be the "last exit" for functional recovery of patients with psychiatric disorders as well [61].
In the literature, it is still controversial in decision making whether we should perform a primary surgical amputation or limb salvage procedures in non-critically ill polytraumatized patients with severely destroyed hindfoot injuries. Patients with limb salvage procedures reported less favorable outcomes than patients sustaining primary surgical amputation related to mobility, activity, social interaction, emotional behavior, pain with walking, returning to work, and the number of required rehospitalizations for secondary surgical procedures [9, [62][63][64][65]. On the other hand, limb salvage procedures may have result in good outcomes in females younger than 35 years with a high level college education, and ORIF seems to have better outcomes than CLEF [7,66]. When posttraumatic or postoperative osteomyelitis occurs that can also be based on initial treatment failures such as delayed wound closure in 28,8% of cases, secondary amputation at the lower extremity is not always avoidable [8, 26,[66][67][68]. Limb salvage in case of a posttraumatic osteomyelitis at the distal tibia metaphysis, such as in our presented case, is a challenging therapeutic problem. Successful treatment can be associated with a large number up to 18 required surgical procedures over a period of 3 months, and followed by a further duration of 6 months for ambulatory rehabilitation [31]. Essential prerequisite for doing this is the compliance of patients that was not given in our presented case. James Syme (1799-1870), one of the last and greatest pre-Listerian surgeons from Scotland, first performed his amputation technique in 1842 in a 16-year-old boy who suffered from caries of the tarsal bones, almost certainly tuberculosis, after his own experiences with the Chopart's disarticulation over a period of 13 years in Edinburgh, and he has described his new technique as follows in the original: "... As the disease had extended beyond the limits of Chopart's amputation it would have been necessary in accordance with ordinary practice to remove the leg below the knee, but as the ankle joint seemed sound I resolved to perform a disarticulation there. With this in view, I cut across the instep in a curved direction with the convexity towards the toes, and then across the sole of the foot so that the incisions were nearly opposite one another. The flaps thus formed were next separated from their subjacent connexions which was easily effected except at the heel  where the firmness of texture caused a little difficulty. The disarticulation being readily completed, the malleolar projections were removed by means of cutting pliers." [69,70]. Interestingly, archaeological findings at the northern coastal of Peru suggest that surgical disarticulations in ankle joint similar to Syme's technique could have been performed quite substantially earlier during the Moche culture in the ancient pre-European period (AD 100-750) approximately 1.500 years before Syme's first description, and a ceramic vessel of the Moche culture in the American Museum of Natural History (New York) showing that these patients could already have used orthotic devices for their stumps [71]. The aim of this procedure is that there is a bulky full-weight bearing stump on a broad-based bony support obtaining the plantar heel's flap sensibility which make it possible to stand upright on the stump without an orthotic device for example in a shower or a swimming pool [72,73]. Syme advocated that the calcaneus should be dissected subperiostally from the heel flap, it leaves the heel flap lined with the periost which more readily adheres to the cut surface of the tibia, and so, a posterior displacement of flap can be avoided [74]. Essential prerequisite for success of this procedure is the careful dissection of the posterior neurovascular bundle behind the medial malleolus before performing the transmetaphysal single cut that involves both malleoli, and the success rate also depends on the degree of skill and attention on the part of the surgeon [75]. If the plantar heel flap does not show sufficient blood supply after release of tourniquet, the twostage Wagner's procedure can be helpful that includes a secondary stump's closure with the flap [76]. After wound healing the heel flap should be strapped to the lower leg to ensure its position, however, its posterior displacement is one of the most common problem [72,74,77]. The resultant leg shortening up to 8 cm must be compensated with a specific orthotic device (i.e. Syme prosthesis) which make it possible to make the bulky stump less apparent [78,79]. Weaver et al. reported on 35 patients with a primary wound healing in 86% of cases, and 97% of them could be successfully rehabilitated [80]. For high-risk patients (diabetes, peripheral arterial disease, infection) in whom major amputation had been recommended, a wound healing could be achieved in 50% of cases, and 26% of cases were functioning well in a Syme prosthesis, respectively [81]. It is noted that the failure rate of Syme's amputation (i.e. revision to a more proximal level) is with a relative portion of 41% in patients with dysvascular lesions significantly higher than in patients with traumatic injuries with 29%, and so, this technique is not always recommended for patients with peripheral arterial disease and/or diabetes [77]. The essential key point for success is the clinical assessment of ankle pulses before surgery. Francis et al. found that in 85% of patients the Syme amputation was successful when the posterior tibial artery pulse was palpable in comparison to 25% of patients only in whom the pulses were not palpable [82]. However, recent long-term data derive the opinion that patients who underwent Syme's amputation appear to fare better than similar patients with transtibial amputation. These data also refute the notion of high complication rates and difficulties with prosthetic fitting. These patients required less rehabilitation and achieved improved levels of functional independence as demonstrated by favorable functional, mobility, and bothersome indices [83].

Conclusion
Despite all modern aspects in trauma and reconstructive surgery it is to be considered by the authors that the Syme amputation of the left severe posttraumatic flat foot accompanied with pronounced posttraumatic osteomyelitis of the hindfoot involving the distal tibia metaphysis was the only method of choice for early recovery (i.e. end-bearing mobilization) of our patient with psychiatric disorder accompanied with suicidal tendency (i.e. non-compliance). Furthermore, it seems to be doubtful whether a reconstruction (i.e. third stage of management) of her also right severe posttraumatic flat foot based on pronounced calcaneal non-union becomes possible with our critical patient's situation, and all surgeons should be aware about their objectives as well as their limitations, and the wishes and claims on the part of the patients in such a specific situation [84,85].

Conflict of interests
The authors declare that they have none conflict of interests concerning this article.