Features of Peutz-Jeghers syndrome are all except?
**Core Concept**
Peutz-Jeghers syndrome (PJS) is a rare autosomal dominant genetic disorder characterized by the development of benign hamartomatous polyps in the gastrointestinal tract and an increased risk of various cancers. The syndrome is caused by mutations in the STK11/LKB1 gene, which encodes a tumor suppressor protein involved in cell polarity and apoptosis.
**Why the Correct Answer is Right**
The correct answer is related to the clinical features of PJS. The syndrome is characterized by the presence of gastrointestinal polyps, particularly in the small intestine, and an increased risk of certain cancers, such as breast, ovarian, and colon cancer. The syndrome also typically presents with distinctive mucocutaneous melanin deposits, leading to blue or dark brown macules on the lips, oral mucosa, and digits.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is actually a feature of PJS. The presence of gastrointestinal polyps is a hallmark of the syndrome.
**Option B:** This option is incorrect because it is a known association of PJS. The increased risk of certain cancers, including breast, ovarian, and colon cancer, is well-documented in individuals with PJS.
**Option C:** This option is incorrect because it is a characteristic of PJS. The distinctive mucocutaneous melanin deposits are a key clinical feature of the syndrome.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that individuals with PJS have an increased risk of various cancers, and a high index of suspicion is necessary for early detection and management.
**Correct Answer:** D.