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Dysgerminoma of Ovary (40X)
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Dysgerminoma of Ovary (40X)

This close up contains both neoplastic cells (to the left) and small lymphocytes in the delicate fibrous septae to the right (black arrows).
The neoplastic cells have large nuclei with mild irregularity of the nuclear outline.
Nucleoli can be seen.
The cells have mostly clear cytoplasm.
The cell borders are well demarcated.
(Description By:Melinda Sanders, M.D. )
(Image Contrib. by:Melinda Sanders, M.D. UCHC )
Dysgerminoma
Etiology

Unknown
Pathogenesis

Unknown.,
Epidemiology

Usually teenage girls or young women
2% ovarian neoplasms
1/2 of malignant germ cell neoplasms
Gonadal dysgenesis may be setting for some
General Gross Description

Usually unilateral and confined to ovary.
Homogenous tan, fleshy lesion
Usually without hemorrhage or necrosis
General Microscopic Description

Identical to seminoma
Cells in nests separated by delicate fibrovascular septae
Septae may contain lymphocytes or even granuloma
Cells have round to oval nuclei, relatively clear cytoplasm, and well defined cell borders.
Clinical Correlation

If confined to the ovary and <10 cms. cure can be achieved with surgery alone
Exquisitely radiosensitive if metastatic.
References

Cotran RS, Kumar V, Robbins SL: Robbins Pathologic Basis of Disease. 5th ed. Philadelphia, W.B. Saunders, 1994, pp. 1071-1073.
Dysgerminoma
Synopsis by: Melinda Sanders M.D. (T87000M90603)[271]
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