Okay, let's tackle this question. The patient has three main symptoms: familial polyostotic fibrous dysplasia, precocious puberty, and pigmentation. I need to figure out what syndrome this is.

First, the three Ps: polyostotic fibrous dysplasia, precocious puberty, and pigmentation. That rings a bell. Oh right, McCune-Albright Syndrome. It's a genetic disorder caused by a mutation in the GNAS gene. The fibrous dysplasia is the bone part, the precocious puberty is due to endocrine issues, and the pigmentation is the café-au-lait spots.

Wait, let me make sure. The options probably include other syndromes. Like Albright Hereditary Osteodystrophy? No, that's related to pseudohypoparathyroidism. Or maybe something like MEN syndromes? No, those don't have the pigmentation. Neurofibromatosis type 1 has café-au-lait spots but not the other two features. So McCune-Albright is the key here.

The correct answer is McCune-Albright Syndrome. The other options don't fit all three features. The clinical pearl here is the three Ps: Polyostotic fibrous dysplasia, Precocious puberty, and Pigmentation (café-au-lait spots). Students should remember this triad for the syndrome.

**Core Concept**
The triad of polyostotic fibrous dysplasia, precocious puberty, and café-au-lait pigmentation is pathognomonic for **McCune-Albright Syndrome (MAS)**, a genetic disorder caused by somatic mutations in the *GNAS* gene. This leads to dysregulated G protein signaling in affected tissues, resulting in fibrous dysplasia of bones, endocrine hyperfunction (e.g., precocious puberty), and cutaneous manifestations.

**Why the Correct Answer is Right**
McCune-Albright Syndrome is characterized by:
1. **Polyostotic fibrous dysplasia**: Bone lesions due to defective osteoblast differentiation.
2. **Precocious puberty**: Often central or peripheral (due to hypothalamic-pituitary-adrenal/ovarian axis hyperactivation).
3. **Pigmentation**: Café-au-lait spots with a "coast of California" irregular border, distinct from Neurofibromatosis type 1.
The *GNAS* mutation is postzygotic, explaining the mosaic presentation and familial occurrence in 10-15% of cases.

**Why Each Wrong Option is Incorrect**
**Option A:** *Neurofibromatosis type 1* includes café-au-lait spots but lacks fibrous dysplasia and is autosomal dominant.
**Option B:** *Albright Hereditary Osteodystrophy* causes short stature, brachydactyly, and pseudohypoparathyroidism but no pigmentation.
**Option C:** *McCune-Albright is often confused with MEN syndromes*, but these involve endocrine tumors (not fibrous dysplasia or pigmentation).

**Clinical Pearl / High-Yield Fact**
Remember the **3 Ps of McCune-Albright**: **Polyostotic** fibrous dysplasia, **Precocious** puberty, and **Pigmentation** (café-au-lait spots).

✓ Correct Answer: B. McCune Albright syndrome