Guillain-Barre syndrome typically occurs when the immune system malfunctions and hence, immune response develops against its own neural tissues due to foreign antigens triggered by infectious agents (
1,
2,
10). Occasionally, autoimmunity is not due to infectious episodes, and surgery, spinal anesthesia and trauma can also be the reasons (
5-
7). Nevertheless, the autoimmune-attack damages myelin sheaths of the peripheral nervous system and in connection with that, it leads to nerve conduction blockade resulting in muscle paralysis, which can be accompanied by sensory and autonomic disorders (
11). This syndrome is a peripheral nerve disease and in general, it does not yield nerve damage in the brain and spinal cord. Except that, the syndrome has a distinctive relevance with brain and spinal cord injury.
As being the first case in literature, Duncan et al. (
5) reported the development of GBS following head trauma as “post-traumatic GBS” in 1987. The case was a sixty-one-year-old patient, who had went through a head trauma resulting in bilateral frontal and parietal hemorrhage, and reported dysphagia and dyspnea on the ninth day accompanying tetra paresis with bulbar involvement and 3
rd and 7
th cranial nerve palsy. Hereafter, De Freitas et al. (
6) presented a case of occipital hematoma and subarachnoid hemorrhage with concomitant bulbar involvement developed on the third day and ended up with mortality on the eighth day for a twenty-nine-year-old patient having a history of alcohol, marijuana and cocaine use. In a similar manner, Tan et al. (
7) appraised a case where a forty-four-year-old patient with TBI with a history of alcohol use died one week after the bulbar involvement had appeared. Further, Battaglia et al. (
8) enunciated another case in 2013 for a seventy-three-year-old patient with temporal and frontal hematoma where the patient had swallowing difficulties, facial weakness and tetra paresis fourteen days after spinal surgery. Lastly, Carr et al. (
9) affirmed a GBS case with weakness in extremities and facial weakness that started developing on around the 17
th day in a fifty-eight-year-old patient having bilateral frontal hematoma and subdural hemorrhage.
Similar to the cases reported in the literature, in our case, there were frontal lobe hemorrhage and subarachnoid hemorrhage in the occipital region resulting from serious brain injury, as well. Similar to the patients in the aforementioned reports except those presented by Freitas et al. (6) and Tan et al. (
7), fully cooperative and oriented patients were exhibiting fulminant and rapidly progressive GBS involvement within one to three weeks after recovery without sequelae of musculoskeletal system. Unlike the patients mentioned in the reports of De Freitas et al. (
6) and Tan et al. (
7), the patient of this study did not have additional comorbidities or alcohol and substance abuse. Those patients might have already had poor immune systems due to alcohol and substance abuse. The studies investigating the association between alcohol abuse and the immune system have revealed that the number of lymphoid cells decreases in peripheral blood, spleen and thymus, and notably, there exists suppression of T cell dependent immune responses (
12).
It was noted in reported cases, as well as here in this case study, that following the IVIG therapy, there was rapid recovery of the cranial nerve palsy in a few days and also slower functional recoveries occurred in motor functions, in particular at lower extremities in about five to eight weeks. The IVIG therapy was found to be effective on GBS, particularly where a rapid clinical progress, evident motor weakness and findings of bulbar involvement existed or the patient had respiratory insufficiency (
10). It was shown that high-dose IVIG treatment binds the antibodies, in this way, prevents formation of new antibodies, and therewithal, has effects on the complement system. Also here in this case study, a rapid improvement was observed on facial weakness and dysphagia after IVIG treatment however, there was a partial loss of motor functions on the 18
th day when the patient was admitted to our clinic. It was revealed in case reports that the improvement might be multifactorial depending on the severity of involvement during the acute stage and the degree of organ dysfunction (
5-
7). Similar to cases in the literature, the involvement in our patient was as severe and rapidly progressive as that which led to the development of dysphagia. In line with the literature, this result may demonstrate the loss of motor functions on the 17
th day during the patient admission.
In addition to these, it was stated in literature that a statistically significant risk increase was found in GBS development following surgery as against the general population (
13). Gensicke et al. (
13) elucidated through their study with a sixty-three-year-old patient that the physiologic stress due to surgical trauma and changes in immunological functions might affect the cellular and humoral immune system by activation of the neuroendocrine stress axis. Rapidly progressive clinical picture of GBS improvement was evinced in postoperative phase about two to three weeks after surgery, similar to the one figured in case of TBI (
14).
Previous studies reflected that TBI caused depression of cellular immunity and by extension; patients became more susceptible to infections and had anergy, namely, lack of immune response to antigens (
5-
9). Besides, it was reported that levels of B-cells and immunoglobulin-forming humoral immunity increased (
5-
9). Despite the fact that the mechanism of GBS improvement following head trauma could not be fully explained in the literature, it has been evinced that the one reason for the post traumatic pathogenesis of GBS was the molecules shown to be immunogenic such as myelin basic protein are perceived as foreign antigens due to crossing to the central nervous system depending on the impairment of blood-brain barrier (
5-
9). This finding has also been supported by some recent studies demonstrating that the levels of antibodies, such as anti-myelin antibodies or anti-ganglioside antibodies are increased following TBI (
9), while it can be considered as a limitation of this study since the levels of antibodies were not assessed.
In conclusion, although the exact mechanism is unclear, GBS can develop around one to three weeks after TBI. Sudden onset of GBS symptoms following trauma such as facial paralysis and motor weakness in extremities may erroneously be assessed as secondary complications of the TBI and may cause a waste of time and unnecessary CT scan and MRI evaluations for a definitive diagnosis. The effect of early IVIG treatment on functional recoveries of GBS patients following TBI should also be in mind during the follow-up process.