There was no evidence of dissection.
 the patient had a CTA
(ROOT (S (NP (EX There)) (VP (VBD was) (NP (NP (DT no) (NN evidence)) (PP (IN of) (NP (NN dissection))))) (. .)))
(ROOT (S (NP (DT the) (NN patient)) (VP (VBD had) (NP (DT a) (NN CTA)))))
( There ( ( was ( ( no evidence ) ( of dissection ) ) ) . ) )
( ( the patient ) ( had ( a CTA ) ) )