A 35-year-old man presents with a history of infertility. He and his partner have been trying to conceive for over two years without success. The patient undergoes a comprehensive fertility evaluation, including semen analysis, which reveals azoospermia (complete absence of sperm in the ejaculate). Given this finding, further investigations are initiated, including genetic testing and a testicular biopsy. Genetic testing identifies a microdeletion in the AZFa region of the Y chromosome. The AZF (Azoospermia Factor) regions are critical for spermatogenesis, and deletions in these regions are a well-known cause of male infertility. To confirm the underlying cause of azoospermia, a testicular biopsy is performed to evaluate the histopathology of the testicular tissue. What is the most likely histopathological finding in the testes of this patient?
