stiil wet during day

  i have a 6 year old son who still wets himself night and day (several times during the day) he did try the bed weting mat and after 3 months of trying he did stay dry at night for about 6 weeks(but he would still wet his pants slighty then go to the toilet)then went back to old habits.he says he gets no feeling he has to go until he gets a drop out of his penis
  he has had a renal ultrasound .this showed two simple cysts in his right kidney and that his bladder still had about 40 mls in it after voiding .a xray of his spine showed slight flattening of the internal aspects of the  pedicles and increased interpedicular distances in the L3-L5 with L5 BEING 3.5 CM COULD THIS BE THE CAUSE of his problems or what else could cause this type of problem. what would you suggest as the next course of action

[hfhs M.D.-AK]

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Dear Ruth,
Enuresis is defined as an involuntary discharge of urine but is imprecisely used to describe bed wetting.  Approximately 15% of normal children still wet the bed at age 5 and this gradually becomes more of a concern once the child enters school.  It is not until the age of 7 that dryness is expected by your child