**Core Concept**
Leptospirosis is a zoonotic disease caused by the bacterium *Leptospira*, leading to a range of clinical manifestations due to its impact on multiple organ systems. The clinical presentation of leptospirosis can vary from mild to severe, including symptoms like fever, headache, and muscle aches, to life-threatening complications such as acute kidney injury and respiratory failure.

**Why the Correct Answer is Right**
Massive splenomegaly is not typically associated with leptospirosis. The disease primarily affects the liver, kidneys, and lungs, leading to symptoms like jaundice, hemorrhage, and hepatomegaly. In contrast, splenomegaly is more commonly seen in diseases involving the reticuloendothelial system, such as malaria, typhoid, or viral infections.

**Why Each Wrong Option is Incorrect**
**Option A:** Jaundice, which may be intense, is a common feature of leptospirosis due to the liver's impaired function, leading to elevated bilirubin levels. This is a hallmark symptom of the disease.
**Option B:** Hemorrhage is a known complication of leptospirosis, particularly in severe cases, where it can manifest as bleeding into the lungs, liver, or kidneys.
**Option C:** Hepatomegaly is also a feature of leptospirosis, resulting from the liver's inflammation and impaired function.

**Clinical Pearl / High-Yield Fact**
In leptospirosis, the presence of jaundice, particularly if intense, is a key diagnostic clue. It is essential to consider leptospirosis in patients presenting with jaundice, especially those with a history of exposure to contaminated water or animals.

✓ Correct Answer: D. Massive splenomegaly