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11–14 APRIL, 2018, HELSINKI, FINLAND
10:22–10:25
S15-3 (PP)
EVOLUTION AND POSTNATAL OUTCOME OF PRENATALLY-
DIAGNOSED SIMPLE RENAL CYSTS
Stavros LOUKOGEORGAKIS
1
, Elisabetta SANNA
2
, Ingrid DERWIG
2
, Gauri
PARAMASIVAN
2
, Christoph LEES
2
and Marie-Klaire FARRUGIA
1
1) Chelsea and Westminster Hospital, Paediatric Urology, London, UNITED KINGDOM - 2) Queen Charlottes
and Chelsea Hospital, Centre for Fetal Care, London, UNITED KINGDOM
PURPOSE
To establish pre- and post-natal evolution and outcome of prenatally-diagnosed simple renal cysts.
MATERIAL AND METHODS
We retrospectively reviewed all prenatally-diagnosed simple renal cysts (2005–2016) in a single
tertiary fetal centre, using the Astraia Obstetrics database (Astraia Software Gmbh). The diagnosis
was based on the presence of a solitary, non-septated non-commiunicating cyst in an otherwise
normal kidney. Gestational age (GA), location and size of the renal cyst at diagnosis and subsquesnt
scans were recorded. Fetuses were delivered locally. Following ethical approval, we reviewed
postnatal scans and patient records at each hospital.
RESULTS
Renal cysts were indentified in 31 fetuses at a median GA of 23 (20–36) weeks. Cysts were
bilateral in 3 fetuses (9.6 %) and unilateral in 28 fetuses (90.4 %) with equal left/right distribution.
Median maximum diameter was 15 (4–35) mm. Antenatal cyst resolution was observed in 4 fetuses
(12.9 %), and the diagnosis was modified in 5 (16.1 %) to hydronephrosis (3), adrenal mass and
echogenic kidney. Postnatal follow-up data was available for the remaining 22 patients. Eight cysts
(36.4 %) resolved; whereas 3 (13.7 %) persisted and were managed conservatively for a median
51 (39–60) months. In the remaining 11 (50 %), postnatal findings were MCDK (3), duplex kidney
with dilated upper moiety (3), adrenal mass (3) patients and unilateral renal agenesis (2).
CONCLUSIONS
Our study suggests caution when counselling for prenatally-diagnosed renal cysts as in over half
the cases postnatal investigation reveals alternative diagnoses such as a cystic duplex or adrenal
mass which may require further investigation. It is also interesting to note that the cyst may be a part
of an involuting MCDK resulting in postnatal renal agenesis.
10:25–10:34
Discussion