All are features of Hypernephroma except-
**Core Concept**
Hypernephroma, also known as renal cell carcinoma (RCC), is a type of kidney cancer that arises from the epithelial cells of the renal tubules. It is a malignant tumor that can cause various systemic effects due to the production of paraneoplastic hormones and substances.
**Why the Correct Answer is Right**
Hypernephroma often presents with a triad of symptoms: hematuria (blood in the urine), flank pain, and a palpable abdominal mass. The tumor can also cause paraneoplastic syndromes such as hypertension, polycythemia (elevated red blood cell count), and hypercalcemia (elevated calcium levels) due to the production of erythropoietin and parathyroid hormone-related protein.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because hypernephroma typically does not present with symptoms of hypocalcemia (low calcium levels) as a paraneoplastic syndrome. Instead, it often causes hypercalcemia.
**Option B:** This option is incorrect because hypernephroma can cause a variety of systemic effects, including hypertension and polycythemia, but it is not typically associated with a significant increase in thyroid hormone levels.
**Option C:** This option is incorrect because hypernephroma is a type of kidney cancer that arises from the epithelial cells of the renal tubules, and it is not a benign condition.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that hypernephroma can cause a variety of systemic effects due to the production of paraneoplastic hormones and substances, making it a challenging diagnosis to rule out based on symptoms alone.
**Correct Answer:** A.