Commentary for Berakhot 116:9

ל"ק הא ממעי אמו הא בתר דאיתיליד דיקא נמי דקתני דומיא דקטע שמע מינה

There is no contradiction ; the former refers to one suffering thus from his mother's womb, the other to one suffering thus after birth. This is also proved from the fact that he teaches that [the man afflicted with leprous eruption] is like the person with an amputated limb. Deduce from this [that the leper referred to in the Baraita is one who became diseased after birth].

Abraham Cohen Footnotes to the English Translation of Masechet Berakhot