Patients with Invasive Tumors and eNOS Gene Polymorphisms with Subarachnoid Hemorrhage Tend to Have Poorer Prognosis.

 Endothelial nitric oxide synthase ( gene polymorphisms are found to predict predisposition to aneurysmal rupture and development of vasospasm in a patient of subarachnoid hemorrhage (SAH). gene polymorphisms are also found to predict invasiveness of malignant cells. Studies are not available in literature to describe the effect of gene polymorphisms and correlation between aneurysm and carcinoma. This study aims to investigate whether positive cancer history influences clinical outcome following SAH and gene polymorphisms.  The gene polymorphisms were analyzed in seven consecutive patients (mean age, 52.28 ± 20 years) with a diagnosis of invasive systemic tumors from 2011 to 2017. The 4a/4b -786T> 894G > T polymorphisms of the gene were determined by polymerase chain reaction and restriction fragment length polymorphism.  Seven patients of aneurysmal SAH in association with malignancies were studied for polymorphisms expression and outcome. Three patients had carcinoma cervix: one patient of carcinoma breast and one each of transitional cell carcinoma of urinary bladder, spindle cell carcinoma of left kidney, and untreated patient of atypical pituitary (adenoma). A genotype study of gene polymorphisms in these patients shows common polymorphisms are involved in the determination of disease progression in malignancies and aneurysmal SAH.  Patients who expressed 4ab, -786T > TT/CC/TC, 894G > T GG/GT polymorphisms did better than patients who expressed only 4bb, though both were associated with poor prognosis.