Introduction:   Acne scars are largely preventable complications  of acne.   95% of the scars occur over the face thus impacting the quality of life.  Correction of scars is  the priority  for acne patients. There is no single treatment modality that has been shown to be universally effective. Microneedling is a relatively new minimally invasive procedure used as  a collagen induction therapy for skin rejuvenation and facial  scars.

Aim  of  the  work:   Evaluation  of  efficacy  of  rnicroneedling with  topical  vitamin    C  in

treatment of acne scars.

Patients   and  Methods:   Ten  patients  with  post  acne  atrophic  facial  scars attending  the

outpatient  clinic  of    Dermatology  in  Sohag University  Hospitals  between  June  2014  to September 2017 were offered   six microneedling  sessions plus topical   vit. C (during the session of microneedling  and daily topical application in between sessions)   microneedling sessions   were  four  weeks   apart.   They   were  evaluated  monthly  and  one  month  after

completion of sessions for both efficacy and safety of the procedure.

Results:  The mean±  SD of the patients' age in the study population  were 28.900   ±5.384yers

old nine females and one males with mean acne   scars duration±   SD 11.900±5.506   years,

90%%  of patients  had psychological   distress from their acne scars.  At  the end of  study duration Out of the ten patients 6(60%)  achieved one grade reduction in their Goodman and Baron qualitative grading score and 2 (20%)  achieved two grade reduction.  According to the

quantitative  ECCA  "  Echella  d'e  valuation  Clinique  des  cicatrices d'acne"  score  80%  Of patients achieved reduction in their score  with 27.5%  improvement in the ECCA score.   The mean  ECCA score value of V scar started to decrease earlier than  both U scar,  and M scar.

40% of patients  had excellent satisfaction and 60% had very good satisfaction.  All treated patients,  had adverse  events  of temporary  erythema,    edema,  bleeding,  or a serous  ooze resolving  with  crusting  or  scabbing  following  each  session  of  microneedling,   bacterial

infection not occurred in any of our patients.

Conclusion:  Multiple minimally invasive sessions of skin microneedling with topical vitamin

C during sessions and daily  application is an effective treatment for post-acne atrophic  scars with the advantage of being a relatively risk-free,  in-office procedure with minimal patient

recovery time.