Korean J Obstet Gynecol.  2011 Jul;54(7):373-376. 10.5468/KJOG.2011.54.7.373.

A case of ovarian deciduosis in pregnancy

• Kim JH
• Nam KH
• Kwon JY
• Kim YH
• Park YW

• KMID: 2274052
• DOI: http://doi.org/10.5468/KJOG.2011.54.7.373

Abstract

Ectopic decidua (deciduosis) has been discovered in variable organs during pregnancy. Ovarian deciduosis, however, is a less frequent event during pregnancy. Ectopic decidua is a physiological phenomenon of pregnancy and arises from a progesterone-induced metaplasia of subserosal stromal cells. As we experienced a case of 21 weeks gestation who was diagnosed with ovarian deciduosis that was suspicious for ovarian malignant tumor, we present it with a brief review of literature.

Keyword

Decidua; Ovarian cyst; Pregnancy

MeSH Terms

Decidua
Female
Metaplasia
Ovarian Cysts
Physiological Phenomena
Pregnancy
Stromal Cells

Figure

• 

  Fig. 1 (A) Transvaginal utrasonogram image shows a 10.9 × 3.9 cm sized heterogenous cystic mass with 6.6 × 3.5 cm, 2.5 × 1.4 cm and 1.8 × 1.4 cm of solid portion on left adnexa. (B) Doppler ultrasonogram image of the mass shows vascularization with pulsatility, a finding that is suggestive of a malignant mass (resistance index [RI], RI=0.37). PSV, peak systolic velocity; EDV, end-diastolic velocity; S/D, systolic:diastolic ratio.

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  Fig. 2 Axial T2-weighted (A), coronal 2-weighted (B) and sagittal T2-weighted (C) images demonstrate late 2nd trimester pregnant state and about 10 × 7 × 4.8 cm sized mass at left adnexa. The solid component along the cyst wall shows intermediate to high signal intensity on T2-weighted images (T2WI). The nodule (arrow) with low signal intensity on T2WI is possibility of paramagnetic component such as hemosiderin. Twenty-one gestational week sized fetus is noted in (C).

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  Fig. 3 Histologic findings: ovary revealed a pinkish tan colored edematous stroma (A, H&E; ×40), deciduosis with hemosiderin laden macrophage (B, H&E; ×100).

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