PAST MEDICAL HISTORY:  Rectal fissure 10 months ago.
 The patient had pain with defication. 
(ROOT (NP (NP (NP (JJ PAST) (JJ MEDICAL) (NN HISTORY)) (: :) (NP (NP (JJ Rectal) (NN fissure)) (ADVP (NP (CD 10) (NNS months)) (RB ago)))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBD had) (NP (NN pain)) (PP (IN with) (NP (NN defication)))) (. .)))
( ( ( ( PAST ( MEDICAL HISTORY ) ) : ) ( ( Rectal fissure ) ( ( 10 months ) ago ) ) ) . )
( ( The patient ) ( ( ( had pain ) ( with defication ) ) . ) )