1. Male Genital Tract I, Case 1
A 32-year-old previously healthy man presents with a painless mass in his left testicle which he noticed about 1month ago.

2. Identify the organ
Identify the structures
Describe the gross findings

3. A – Tunica albuginea
B – Normal parenchyma
C – Neoplasm (seminoma)
Seminoma
The surgical specimen consists of a bisected
testicle revealing a tan, irregular neoplasm.

4. Describe the low power histologic findings
Normal testis
Seminoma

5. Describe the high power histologic findings
Inflammatory
cells (mostly
lymphocytes)
Connective
tissue trabecula
Tumor cells
Are uniform, contain abundant clear cytoplasm and large vesicular nuclei
with prominent nucleoli.

6. Seminoma.
The neoplasm is composed of nests of uniform cells(B) containing large,
vesicular nuclei with prominent nucleoli.
The nests of neoplastic cells are separated by fibrous tissue trabeculae
which contain lymphocytes and plasma cells (A)