RT Book, Section
A1 Shah, Ashish
A1 Sobolewski, Brad
A1 Mittiga, Matthew R.
A2 Knoop, Kevin J.
A2 Stack, Lawrence B.
A2 Storrow, Alan B.
A2 Thurman, R. Jason
SR Print(0)
ID 1181044430
T1 Summer Penile Syndrome
T2 The Atlas of Emergency Medicine, 5e
YR 2021
FD 2021
PB McGraw-Hill
PP New York, NY
SN 9781260134940
LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1181044430
RD 2024/04/18
AB Summer  penile  syndrome  is  a  benign  hypersensitivity  reaction  involving  the  skin  of  the  penile  shaft.  As  the  name  suggests,  it  is  seen  during  the  warm  weather  months.  It  is  also  known  as  seasonal  acute  hypersensitivity  reaction  and  lion’s  mane  penis.  The  history  may  include  recent  play  outside  in  the  grass  or  a  wooded  area  within  the  last  24  hours.  It  is  most  commonly  associated  with  insect  bites,  usually  chiggers,  but  may  also  be  caused  by  exposure  to  plants  (poison  ivy,  sumac,  and  oak).  The  diagnosis  is  made  clinically  and  is  suspected  when  the  skin  of  the  shaft  of  the  penis,  most  often  just  proximal  to  the  glans,  is  markedly  edematous.  There  is  minimal  erythema  and  no  fluctuance.  Four  out  of  five  patients  have  pruritus,  and  few  have  urinary  symptoms.  Symptoms  (both  swelling  and  pruritus)  can  last  up  to  2  to  3  weeks,  but  most  patients  have  resolution  in  4  to  5  days.  The  differential  diagnosis  includes  trauma,  nephrotic  syndrome,  HSP,  balanitis,  phimosis,  paraphimosis,  and  priapism.