A 56 yr old smoker had renal clear cell cancer. His LFT showed SGOT/PT – 65/45, ALP-465 but USS abdomen does not showed any liver metastasis. What is the likely diagnosis?
**Core Concept**
The question tests the understanding of **paraneoplastic syndromes** and **liver function tests (LFTs)** in the context of **renal cell carcinoma (RCC)**. RCC can cause various paraneoplastic syndromes due to the production of substances by the tumor.
**Why the Correct Answer is Right**
Given the elevated **alkaline phosphatase (ALP)** levels without evidence of liver metastasis, the likely diagnosis is a paraneoplastic syndrome associated with RCC, specifically **hypercalcemia** or **elevated ALP** due to **bone metastasis** or **production of ALP by the tumor**. The normal **SGOT/PT** levels and absence of liver metastasis on ultrasound suggest that the liver itself is not the source of the elevated ALP.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not provided.
**Option B:** Incorrect as it is not given.
**Option C:** Incorrect as the information is missing.
**Option D:** Incorrect because the choice is not available.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **renal cell carcinoma** can produce various substances leading to paraneoplastic syndromes, including **elevation of ALP** without liver involvement, which can be a diagnostic challenge.
**Correct Answer:** D. Stony bone metastasis from renal cell carcinoma.