https://docs.google.com/viewer?a=v&q=cache:_YL6jcwRNCQJ:195....

--------------------------------------------------
Note added at 7 hrs (2012-03-05 09:56:24 GMT)
--------------------------------------------------

http://www.proz.com/kudoz/polish_to_english/medical_general/...

krążek = disc

--------------------------------------------------
Note added at 8 hrs (2012-03-05 10:06:47 GMT)
--------------------------------------------------

zgięcie esiczo-odbytnicze: Tłumaczenie i definicja w Ling.pl, słownik ...
www.ling.pl/zgięcie esiczo-odbytnicze - Translate this page
Tłumaczenie i definicja słowa zgięcie esiczo-odbytnicze : Rectosigmoid junction.

--------------------------------------------------
Note added at 8 hrs (2012-03-05 10:08:04 GMT)
--------------------------------------------------

could this possibly be

rectal disc

Laparoscopic management of colorectal endometriosis.
www.ncbi.nlm.nih.gov/pubmed/10556452
by BL Jerby - 1999 - Cited by 112 - Related articles
Twelve required superficial excision of colon or rectal endometriomas. Protectomy/proctosigmoidectomy was done in seven cases, and rectal disc excision was ...

I don't do Polish!! so beware:)