Most common type of Thyroid carcinoma is
Testicular Tumors Testicular tumors account for 2% of all pediatric tumors. A bimodal age distribution is observed; one peak occurs in the first 2 years of life, and the second occurs in young adulthood.
a. Tumours of the testis are classified according to the predominant cellular type:
b. Seminoma (40 per cent);
c. Teratoma (32 per cent);
d. Combined seminoma and teratoma (14 per cent);
e. Interstitial tumours (1.5 per cent);
f. Lymphoma (7 per cent);
g. Other tumours (5.5per cent).
h. Teratomas tend to occur in a younger age group, the peak incidence being between 20 and 35 while that of seminoma is between 35 and 45. Seminoma is extremely rare before puberty.
i. Pediatric prepubertal testicular tumors are dramatically different from adult neoplasms. Germ-cell tumors account for only 60-77% of testicular tumors in children but account for 95% of testicular tumors in adults.
j. The most common germ-cell tumors are teratomas and yolk-sac tumors, which account for about 65% of testis tumors.
k. Yolk sac tumor is the most common testicular tumor in infants and children up to 3 years of age, and in this age group it has very good prognosis.