**Core Concept:** The frontal lobes are a part of the cerebral cortex located at the front of each hemisphere of the brain. They are involved in various higher cognitive functions, including planning, decision-making, personality expression, and motor control. Frontal lobe tumors can disrupt these functions leading to specific clinical features.

**Why the Correct Answer is Right:** The correct answer, option C (disinhibition), is related to the role of the frontal lobes in controlling impulses, inhibition, and decision-making. When the frontal lobes are compromised by a tumor, the inhibition of these higher functions is disrupted. This leads to a lack of self-control and impulsivity, which is called disinhibition.

**Why Each Wrong Option is Incorrect:**

A. **Anhidrosis (inability to sweat):** This is related to the autonomic nervous system, not the frontal lobes. Anhidrosis can be caused by medications, neuropathy, or autonomic neuropathy, but it is not a feature of frontal lobe tumors.

B. **Piggybacking:** This term is unrelated to the frontal lobes or tumor symptoms. Piggybacking refers to a transportation method where one person rides on the back of another, and has no connection to neurological disorders.

D. **Cerebral palsy:** Cerebral palsy is a group of neurological disorders affecting movement and muscle coordination, not a specific feature of frontal lobe tumors. Cerebral palsy is a result of damage to the brain during development or early childhood, while frontal lobe tumors are related to the disruption of higher functions by the tumor itself.

**Clinical Pearl:** When assessing patients with tumor-related neurological symptoms, understanding the specific functions of the affected areas can help guide diagnosis and treatment planning. In this case, recognizing the role of the frontal lobes in higher cognitive functions enables the identification of disinhibition as a key symptom, allowing for a narrowed differential diagnosis and appropriate management strategies.