Peau d’ orange is due to –
**Core Concept**
Peau d' orange, also known as orange peel sign, is a clinical manifestation characterized by a palpable, thickened, and dimpled skin due to lymphatic obstruction. This phenomenon is often associated with malignancies, specifically breast cancer, which obstructs the lymphatic vessels, leading to edema and skin changes.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of lymphatic obstruction. When the lymphatic vessels are blocked, lymph fluid accumulates in the interstitial space, causing edema and skin thickening. In the context of breast cancer, the tumor can invade and compress the lymphatic vessels, leading to the characteristic peau d' orange appearance. This is due to the blockage of lymphatic drainage, which normally helps to remove excess fluids and proteins from the interstitial space.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not directly relate to the pathophysiology of lymphatic obstruction.
**Option B:** This option is incorrect because it is a different clinical manifestation associated with a different condition.
**Option C:** This option is incorrect because it is a different skin condition that does not involve lymphatic obstruction.
**Clinical Pearl / High-Yield Fact**
Peau d' orange is a classic clinical sign of breast cancer metastasis to the lymph nodes, and its presence should raise suspicion for malignancy. It is essential to remember that this sign can be present in other conditions as well, such as lymphedema or other types of skin diseases.
**Correct Answer:** D.