Grimal et al identified prognostic factors associated with megacystis diagnosed in utero.
Criteria for megacystis in a fetus - one or both of the following:
(1) largest bladder diameter in first trimester >= 7 mm
(2) large bladder that does not empty after 45 minutes during second or third trimester
Causes may include:
(1) idiopathy megacystis
(2) posterior urethral valves
(3) transient megacystis
(4) complex uropathy
|
Finding
|
Percent Survivors
|
Percent Nonsurvivors
|
|
first trimester diagnosis
|
34%
|
86%
|
|
associated abnormalities
|
1.3%
|
24%
|
|
largest bladder diameter > 15 mm
|
3%
|
52%
|
|
oligohydramnios
|
0%
|
19%
|
where:
• Some of the data in the text on page 2 (column 1) differs from that in Table 1.
• Oligohydramnios was not significant in multivariate analysis.
