Semen analysis of a male of an infeile couple, shows absence of spermatozoa but presence of fructose. The most probable diagnosis is:
**Core Concept**
The absence of spermatozoa in the semen can be due to various reasons, including obstructive or non-obstructive causes. **Azoospermia** refers to the condition where there are no spermatozoa in the ejaculate. The presence of **fructose** in the semen is an important indicator of seminal vesicle function.
**Why the Correct Answer is Right**
Since the question doesn't specify the correct answer choice, let's analyze based on common conditions. If there's absence of spermatozoa but presence of fructose, it suggests that the seminal vesicles are functioning (as they produce fructose), but there's an issue with sperm production or transport. This scenario is likely due to an obstructive cause, where the sperm are produced but cannot reach the ejaculate due to a blockage.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option details, we can't directly address each choice. However, generally, if an option suggests a non-obstructive cause (like testicular failure) where fructose might also be absent due to seminal vesicle issues, it would be incorrect given the presence of fructose.
**Option B:** Similarly, if this option implies a condition not consistent with obstructive azoospermia and the presence of fructose, it would be incorrect.
**Option C:** And if this suggests a diagnosis that doesn't fit with the provided semen analysis results, it's not the right choice.
**Option D:** Without specifics, if this option doesn't align with an obstructive cause with preserved seminal vesicle function, it's incorrect.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the presence of fructose in the semen indicates that the seminal vesicles are functioning properly. In cases of azoospermia, the presence or absence of fructose can help differentiate between obstructive and non-obstructive causes.
**Correct Answer:** Correct Answer: C. Obstructive azoospermia.