Most likely co-morbid psychiatric disorder with PTSD
Alcohol dependence
Factitious disorder (ie. Munchausen)
Deceptive behaviours to falsify symptoms or induce injury, even in absence of obvious external benefit
Conversion disorder
Neurologic symptoms (weakness, abnormal movements), inconsistent with neurologic disease
Malingering
Intentional faking or exaggeration for external benefit. Usually inconsistent, dramatic, demanding.
Somatization
Medically unexplained symptoms & functional somatic symptoms