Objective: Explore the limitations of the classification of body dysmo
rphic disorder. Clinical picture: A Chinese male relentlessly pursued
castration to relieve painful erections which were never substantiated
, The testes and corpora spongiosum had been removed, No psychotic sym
ptom was prominent. Treatment: Cognitive therapy and psychotropics wer
e tried. Outcome: The remaining corpora cavernosa was removed subseque
ntly. Conclusion: The distorted somatic perception and secondary cogni
tive amplification (painful erections) could represent a variant of bo
dy dysmorphic disorder involving internal body image; diagnostic class
ifications should accommodate such a category.