mature teratomas - c.ymcdn.com · struma with dermoid cystic struma. cystic struma cystic struma...
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MATURE TERATOMAS
30% Ovarian tumorsMostly dermoid cysts May be seen at any ageMay be seen at any ageComplications: infection, torsion,
rupture with pseudomalignant change outside ovary, melanosis peritonei, hemolytic anemia, limbic encephalitis
Dermoid Cyst
Dermoid Cyst
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Dermoid Cyst with Abundant Brain
Dermoid Cyst
Sieve –Like Pattern
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Cerebellum
Fetal Cartilage (not immature!)
Selected Home Truths
1. If it looks like a fibroid grossly do not put through any sections. You will just end up confused! (AT Hertig, M.D.)
2. Nothing looks more malignant on high g g gpower than normal proliferative endometrium (AT Hertig, M.D.)
3. If it grossly looks like a dermoid cyst,
it is a dermoid cyst!
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UNCOMMON TISSUES IN DERMOID
Salivary gland 16%Thyroid 13%GI epithelium 12%Lung 3%Retina 2%P t t 1%Prostate 1%Pituitary 1%Pancreas 1%
From Blackwell et al. Am J Obset Gynecol 51:151, 1946
MALIGNANT CHANGE IN DERMOID CYST
• About 1% of cases, disproportionately in postmenopausal years
• Great majority are squamous cell carcinomaj y q
• Others are mostly melanoma and rare sarcomas
• Thorough sampling to show association with dermoid can be crucial
• Theoretically includes mucinous tumors but by convention they are considered separately
Squamous Cell Ca in Dermoid
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Squamous Cell Ca in Dermoid
Struma with Dermoid
Cystic Struma
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Cystic Struma
Cystic Struma
Solid Struma
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Struma
Carcinoid
Insular Carcinoid
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PRIMITIVE GERM CELL TUMORS
DysgerminomaYolk sac tumorEmbryonal carcinomaChoriocarcinomaImmature TeratomaImmature TeratomaPolyembryomaMixed forms (mostly 1 and 2)
Remember some, mostly 1,arise out of gonadoblastoma
DYSGERMINOMA
50% Malignant primitive GCTs
80% <30 years (average 21 years)
10% Grossly bilateraly
10% Biopsy opposite ovary +ve
Rarely hormonal manifestations
Rare origin in gonadoblastoma
Dysgerminoma
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Dysgerminoma
Dysgerminoma
Dysgerminoma
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Dysgerminoma
Dysgerminoma + syncytiotrophoblast giant cells
Dysgerminoma + gonadoblastoma
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Dysgerminoma + gonadoblastoma
Gonadoblastoma
Gonadoblastoma
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Yolk sac tumor
Schiller-Duval bodies
YST, Schiller-Duval bodies
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YST
Choriocarcinoma
Choriocarcinoma
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Choriocarcinoma
IMMATURE TERATOMAS
• Account for 20% of malignant germ cell tumors
• Account for 15% of ovarian cancers in first two decades
• Median age, 18 years• 25% have ipsilateral and 10%
contralateral dermoid cyst• Rarely have elevated hCG and AFP
levels
Immature teratoma
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Immature teratoma
MMMT Teratoma
GRADING OF IMMATURE TERATOMAS
Grade 1: <1 low power field per slide
Grade 2: 2-3 low power fields per slide
Grade 3: 4 or more low power fields per slideGrade 3: 4 or more low power fields per slide
O’Connor and Norris have proposed binary system combining categories 2 and 3
into high grade
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Fibroma• 4% of ovarian tumors
• Mean age 48
• Rarely hormone-producing
• Meigs’ Syndrome (1%) – ascites and pleural effusionascites and pleural effusion
– (ascites alone 10-15%)
• Gorlin’s syndrome (Nevoid BCC syndrome)– Bilateral, calcified
• Bilateral 8%
• Average diameter 6 cm
Fibroma
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Cellular Fibroma
Thecoma
• <1% of ovarian tumors• Mean age 59, rare
under 30• Usually estrogenic
N l ll b i• Nearly all are benign• Unilateral 97%• Size 5-10 cm
Thecoma
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Sclerosing Stromal Tumor
• Young women -80% under 30
• Rarely hormone-producingproducing
• Unilateral, solid to cystic
• Benign
Sclerosing stromal tumor
Leydig Cell Tumor
• Postmenopausal (avg 58)• 75% virilizing, estrogenic
rare• Hilar (most) or non-hilar
(stromal)(stromal)• Unilateral, avg 2.4 cm• Benign• 20% of steroid cell tumors
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Leydig cell tumor
Steroid Cell Tumor
• Younger than Leydig cell tumors (mean 43)
• 50% androgenic, 10% estrogenic, rare progesterone, cortisol, p g , ,aldosterone
• Larger (mean 8 cm), 5% bilateral
Steroid cell tumor
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PRESENTATION OF GRANULOSA CELL TUMOR
• Prepubertal – sexual precocity
• Young woman – menstrual irregularityirregularity
• Postmenopausal – vaginal bleeding
---------------
10% - acute abdomen
10% - incidental finding in hysterectomy
Granulosa cell tumor (GCT)
GCT
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GCT
GCT
GCT
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GCT - diffuse
GCT-cords
GCT
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GCT - grooves
GCT – grooves inconspicuous
GCT – bizarre nuclei
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Juvenile granulosa cell tumor (JGCT)
JGCT – irregular follicles
JGCT – typical cytology
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Ovarian Tumors with Paraendocrine Hypercalcemia
Small cell CA 59%
Clear cell CA 18%
Serous CA 6%Serous CA 6%
Squamous cell CA in dermoid cyst 6%
Dysgerminoma 6%
Mucinous CA 3%
Mixed clear cell/endometrioid CA 1%
Steroid cell tumor 1%
Small cell ca, hypercalcemic (SCC,H)
SCC,H
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SCC,H - follicles
CONFUSING FEATURES OF METASTASES
1. May account for clinical presentation2. May be functioning3. History of primary may be remote
4. Often much larger than primary5. Tendency for cyst formation
6. Maturation phenomenon7. Formation of follicle-like spaces
8. Metastasis may involve ovary harboring primary neoplasm9. Patient may have independent histologically similar primary
tumors of ovary and elsewhere
Krukenberg tumor
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Krukenberg tumor – signet cells
Krukenberg tumor – signet cells
Krukenberg tumor-glands
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Cystic metastatic Ca pancreas
Maturation phenomenon
Pseudomyxoma peritonei
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Metastatic appendiceal mucinous tumor in ovaries
Metastatic gastric Ca
Metastatic gastric Ca