**Question:** Masque Ecchymotique is seen in:-

A. Hemophilia
B. Factor V Leiden Mutation
C. Port Wine Stain Birthmark
D. Vitamin K Deficiency

**Core Concept:** Masque Ecchymotique is a French term that translates to "bruise mask" and refers to a clinical presentation characterized by widespread, spontaneous ecchymoses (bruises) on the skin.

**Why the Correct Answer is Right:** Masque Ecchymotique is primarily associated with Factor V Leiden Mutation (Option B), a genetic defect in blood clotting pathway. This mutation results in a reduction or absence of Factor V, which is essential for the proper functioning of the intrinsic pathway of blood coagulation. The deficiency leads to increased thrombin generation and subsequent hypercoagulable state, causing spontaneous ecchymoses.

**Why Each Wrong Option is Incorrect:**

A. Hemophilia (Option A) is another genetic disorder affecting blood clotting but is caused by deficiency of clotting factors (e.g., Factor VIII, Factor IX). Unlike Masque Ecchymotique, hemophilia presents with spontaneous bleeding rather than ecchymoses.

C. Port Wine Stain Birthmark (Option C) is a congenital vascular malformation and does not involve clotting factors or bleeding tendency. Port Wine Stain Birthmark is a cosmetic concern and does not present with spontaneous ecchymoses.

D. Vitamin K Deficiency (Option D) results in impaired clotting factor synthesis due to impaired vitamin K-dependent clotting factors synthesis, leading to bleeding diathesis, not spontaneous ecchymoses.

**Clinical Pearl:** Masque Ecchymotique is a rare clinical presentation due to Factor V Leiden Mutation, which should be considered in the differential diagnosis of patients with spontaneous ecchymoses, particularly in the absence of trauma or other identifiable cause.