4. Testicular Tumours Flashcards
Incidence of Testicular Tumours
- Practically 99% of testicular neoplasms are malignant
* They constitute 1-2% of malignant tumours in males
Age of Testicular Tumours
Occur at a relatively young age.
Side of Testicular Tumours
Bilateral in 3-5% of cases
ETIOLOGY of Testicular Tumours
- Incompletely descended testes, especially the intra-abdominal variety.
- Klinefelter’s syndrome
- An isochromosome 12p is present in about 80 % of the testicular cancers.
Meaning of isochromosome 12p in ETIOLOGY of Testicular Tumours
The short arm of chromosome 12 on both sides of
the centromere
An isochromosome is a chromosome that has lost one of its arms and replaced it with an exact copy of the other arm
CLASSIFICATION of Testicular Tumours
- Germ cell tumours 86%
- Interstitial tumours (rare). 1.5%
- Lymphoma (Extra nodal) 7%
- Other tumours 5.5 %
Germ cell tumours in CLASSIFICATION of Testicular Tumours
- Seminoma 40%
- Teratoma 32%
- Combined seminoma and teratoma 14%
Alternative name for Teratoma in Germ cell tumours in CLASSIFICATION of Testicular Tumours
Non seminomatous Germ Cell Tumors “NSGCT”
Pathology of Testicular Tumours
- Germ cell tumours 86%
* Interstitial tumours (rare). 1.5%
Germ cell tumours Pathology of Testicular Tumours
- Seminoma
2. Teratoma
Seminoma in Germ cell tumours Pathology of Testicular Tumours
- Age
- CeII of origin
- Macroscopic Picture
- Cut Section
- Microscopic Picture
- Spread
Age in Seminoma in Germ cell tumours Pathology of Testicular Tumours
35-45 years of age.
CeII of origin of Seminoma in Germ cell tumours Pathology of Testicular Tumours
Seminiferous tubules
Macroscopic Picture of Seminoma in Germ cell tumours Pathology of Testicular Tumours
شبه البطاطس لما تتحمر
* Moderate to large
- firm and smooth
- sometimes it is lobulated
The reason why the tumour is sometimes lobulated in Macroscopic Picture of Seminoma in Germ cell tumours Pathology of Testicular Tumours
due to the presence of fibrous septa
Cut Section of Seminoma in Germ cell tumours Pathology of Testicular Tumours
- homogenous
* pink creamy in colour.
Microscopic Picture of Seminoma in Germ cell tumours Pathology of Testicular Tumours
- Cells resemble spermatocytes (rounded or oval with clear cytoplasm & large rounded nuclei).
- Lymphocytic infiltration of the tumour.
Significance of Lymphocytic infiltration of the tumour in Microscopic Picture of Seminoma in Germ cell tumours Pathology of Testicular Tumours
Indicates good immunity and good Localization
Spread of Seminoma in Germ cell tumours Pathology of Testicular Tumours
Lymphatics to the para-aortic and iliac L.Ns.
Teratoma in Germ cell tumours Pathology of Testicular Tumours
- Age
- CeII of origin
- Macroscopic Picture
- Cut Section
- Microscopic Picture
- Spread
Age in Teratoma in Germ cell tumours Pathology of Testicular Tumours
20-35 years of age
CeII of origin of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Embryonic totipotent cells in the rete testes
Meaning of Embryonic totipotent cells
Can give rise to Endo ecto mesoderm
Macroscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
- Variable size.
* always having a smooth surface
The reason why the tumour is always having a smooth surface in Macroscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Usually molded by the tunica albuginea so always having a smooth surface
Cut section of Teratoma in Germ cell tumours Pathology of Testicular Tumours
- Heterogenous
- yellowish in colour
- showing cysts that contain gelatinous material & cartilage nodules.
Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Teratomas are subdivided into 5 subtypes based on histopathologic characteristics:
- Differentiated teratoma
- Malignant teratoma intermediate “MTl”
- Malignant teratoma anaplastica “MTA”
- Malignant teratoma trophoplastica ‘MTT”
- Endodermal sinus tumour “EST”
Meaning of histopathologic characteristics in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Degree of differentiation
Prognosis of Differentiated teratoma in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Good
Alternative name for Malignant teratoma intermediate in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Teratocarcinoma.
Malignant teratoma anaplastica in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
- Alternative name
* Behavior and prognosis
Alternative name for Malignant teratoma anaplastica in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Embryonal carcinoma
Behavior and prognosis of Malignant teratoma anaplastica in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
It a highly malignant tumour with very bad prognosis
Malignant teratoma trophoplastica in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
- Alternative name
- Meaning of Trophoblastica
- Incidence
- Behavior
- Pathogenesis
Alternative name for Malignant teratoma trophoplastica in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
choriocarcinoma
Meaning of Trophoblastica in Malignant teratoma trophoplastica in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Similar to placenta
Incidence of Malignant teratoma trophoplastica in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
rare
Behavior of Malignant teratoma trophoplastica in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
It is the most aggressive malignant tumour known
Pathogenesis of Malignant teratoma trophoplastica in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Cytotrophoblast and syncytiotrophoblast without villus formation.
Endodermal sinus tumour in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
- Alternative name
- Incidence
- Prognosis
Alternative names for Endodermal sinus tumour in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
- Yolk sac tumour “YST”
* Infantile embryonal carcinoma
Incidence of Endodermal sinus tumour in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
It is the most common testicular tumor in infants under 3 and young boys
Prognosis of Endodermal sinus tumour in Microscopic Picture of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Excellent prognosis
Spread of Teratoma in Germ cell tumours Pathology of Testicular Tumours
Blood spread mainly to the lungs & liver.
Carcinomas spread by blood :
- FTC
- Teratoma
- Prostatic carcinoma
- Breast carcinoma
- Bronchogenic carcinoma
- Renal cell carcinoma
Interstitial cell tumours Pathology of Testicular Tumours
- Leydig cell tumour
2. Sertoli cell tumour
Leydig cell tumour in Interstitial cell tumours Pathology of Testicular Tumours
- Age
* Pathogenesis
Age of Leydig cell tumour in Interstitial cell tumours Pathology of Testicular Tumours
Usually occurs before puberty
Pathogenesis of Leydig cell tumour in Interstitial cell tumours Pathology of Testicular Tumours
- It produces excessive amounts of androgens
* leading to infant Hercules