Umhlaza wamathumbu

I-Carcinomaofrectum

I-Carcinomaofrectum ibizwa ngokuba ngumhlaza we-colorectal, sisisu esibi esixhaphakileyo kwindlela yamathumbu, ukwenzeka kwaso kukwindawo yesibini emva komhlaza wesisu nowe-esophagus, yeyona ndawo ixhaphakileyo yomhlaza we-colorectal (malunga nama-60%). Uninzi lwezigulane luneminyaka engaphezu kwama-40 ubudala, kwaye malunga ne-15% zingaphantsi kweminyaka engama-30 ubudala. Amadoda axhaphake kakhulu, umlinganiselo wamadoda kwabasetyhini yi-2-3:1 ngokwembono yeklinikhi, kufunyaniswe ukuba inxalenye yomhlaza we-colorectal ivela kwi-rectal polyps okanye kwi-schistosomiasis; ukudumba okungapheliyo kwamathumbu, amanye anokubangela umhlaza; ukutya okunamafutha amaninzi kunye neproteni ephezulu kubangela ukwanda kokukhutshwa kwe-cholic acid, le yokugqibela ibola ibe yi-unsaturated polycyclic hydrocarbons yi-intestinal anaerobes, enokubangela nomhlaza.

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