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Expectant management.
| Study | Spontaneous resolution | Follow-up |
|---|---|---|
| 1. Westbrook et al (2002) | 5/11 (45%) | 4 months |
| 2. McEvedy11 | 10/21 (47.6%) | 12 years |
| 3. Carp and Stout (1928) | 7/12 (58%) | 3 years |
| 4. Rossen and Walker (1989) (Involved only children) | 22/29 (76%) | 5 years |
| 20/29 (70%) | 2 years | |
| 5. Dias and Buch30 | 20/38 (53%) | 2 and 5 years |
| 6. Zachariae and Vibe-Hansen (1973) | 40/101 (40%) | 6 years |
| Average 49% |
