The Author reports ten cases of affections similar to Marfan's Syndrome and, on the basis of the already rich bibliography, divides them into two groups:
1) cases 4, 5, 6 and 7 appear to suffer from Marfan's Syndrome with all its characters;
2) cases 1, 2, 3, 8, 9 and 10 seem to suffer from another affection, similar but identifiable through some factors such as the different anatomical substratum, possibly the etiopathogenic cause and, mostly, the lack of heredity.
The Author therefore advocates further careful studies of all the factors present in the ascertained cases of Marfan's Syndrome, and the separation of other cases that, much as they may be similar, differ in one or more factors of which heredity is the most significant.