▁F ib rop ap ill om atos is ▁ ▁is ▁a ▁ben ign ▁tum our ▁disease ▁of ▁marine ▁t urt les , ▁pre domin antly ▁in ▁the ▁green ▁sea ▁t urt le , ▁Ch el onia ▁my das , ▁but ▁it ▁has ▁also ▁been ▁reported ▁in ▁the ▁logger head ▁sea ▁t urt le ▁Care tta ▁care tta , ▁o live ▁rid ley ▁Le p ido ch ely s ▁ol iv ace a , ▁K emp ' s ▁rid ley ▁Le p ido ch ely s ▁k em pi i , ▁and ▁le ather back s ▁D erm och ely s ▁cor ia ce a . ▁This ▁ne op last ic ▁disease ▁causes ▁pro l ifer ation ▁of ▁pap ill ary ▁cells ▁( hyper pl asia ) ▁and ▁gives ▁rise ▁to ▁excess ▁f ibr ous ▁connect ive ▁t issue ▁in ▁both ▁e pid erm al ▁and ▁der mal ▁skin ▁layers ▁– ▁or ▁more ▁specifically , ▁pro l ifer ation ▁of ▁der mal ▁fib ro bl asts ▁and ▁e pid erm al ▁ker atin ocy tes . ▁This ▁causes ▁tum or igen esis ▁in ▁sizes ▁less ▁than ▁ 1   cm ▁up ▁to ▁more ▁than ▁ 3 0   cm ▁in ▁diameter . ▁F P ▁is ▁most ▁often ▁found ▁extern ally ▁around ▁the ▁ar mp its , ▁gen it als , ▁neck , ▁eyes , ▁and ▁t ails ▁of ▁t urt les , ▁but ▁ ▁also ▁occur ▁in ▁and ▁around ▁the ▁mouth , ▁and ▁rarely ▁in ▁internal ▁org ans ▁or ▁on ▁the ▁car ap ace