File:Hydatidiform mole.jpg

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Hydatidiform Mole

Several forms of hydatidiform mole: partial mole, complete mole and persistent gestational trophoblastic tumour. Many of these tumours arise from a haploid sperm fertilizing an egg without a female pronucleus (the alternative form, an embryo without sperm contribution, is called parthenogenesis).

The tumour has a "grape-like" placental appearance without enclosed embryo formation. Following a first molar pregnancy, there is approximately a 1% risk of a second molar pregnancy.


ACT Pathology Description

  • Macroscopic: The specimen is an enlarged uterus (140x140x100mm, weighing 725g) with right and left ovaries and fallopian tubes attached. Opening the uterus shows a cavity filled with a grape-like mass. The wall of the uterus is thickened and fibrous.
  • Microscopic: The sections show an interlacing structure within the fibrous lesion. Sections of the cystic contents show numerous dilated and mucoid degenerate proliferative chorionic villi.


Links: hydatidiform mole | placenta abnormalities | placenta


Image Source

ACT Pathology, used with permission Professor Julia Potter (Director of Pathology).

ACT Pathology - Uterus benign fibromyoma hydatidiform mole


Cite this page: Hill, M.A. (2024, March 2) Embryology Hydatidiform mole.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hydatidiform_mole.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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Date/TimeThumbnailDimensionsUserComment
current22:38, 8 October 2015Thumbnail for version as of 22:38, 8 October 2015800 × 739 (73 KB)Z8600021 (talk | contribs)
12:02, 18 August 2009Thumbnail for version as of 12:02, 18 August 2009400 × 369 (29 KB)MarkHill (talk | contribs)Hydatidiform mole Several forms of hydatidiform mole: partial mole, complete mole and persistent gestational trophoblastic tumor. (More? mole types). Many of these tumours arise from a haploid sperm fertilizing an egg without a female pronucleus (the alt

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