Tennis Racquet cells are seen in
**Question:** Tennis Racquet cells are seen in
A. Liver
B. Kidney
C. Muscle
D. Heart
**Correct Answer:** D. Heart
**Core Concept:**
Tennis Racquet cells, also known as Kayser-Fleischer rings or KF rings, are copper-containing pigment deposits in the cornea. They are typically observed in patients with Wilson's disease, a rare genetic disorder affecting copper transport and storage.
**Why the Correct Answer is Right:**
Tennis Racquet cells are found in the cornea due to the accumulation of copper-containing pigment, which is characteristic of Wilson's disease. Wilson's disease is a hereditary disorder caused by mutations in the ATP7B gene, which leads to impaired liver function and copper accumulation, particularly in the cornea.
**Why Each Wrong Option is Incorrect:**
A. Liver: While Wilson's disease involves liver dysfunction, the cornea is the site where Tennis Racquet cells are seen, not the liver.
B. Kidney: Similar to option A, the primary site of copper accumulation is the liver in Wilson's disease, not the kidney.
C. Muscle: Tennis Racquet cells are not found in muscle tissue; they are specific to the cornea.
**Why Each Wrong Option is Incorrect:**
D. Heart: Although Wilson's disease can affect the heart, the primary site of Tennis Racquet cells is the cornea.
**Clinical Pearl:**
Tennis Racquet cells are an important clinical sign in the diagnosis of Wilson's disease, helping to differentiate it from other conditions with copper-containing pigment deposition, such as ceroid lipofuscinosis. Monitoring the progression of Wilson's disease and assessing liver function can be done through periodic assessment of the corneal deposits.