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Zorluk: OrtaGastroenterology and Hepatology

A 28-year-old man is referred to a gastroenterology genetics clinic for evaluation of early-onset colon polyps. A detailed family history reveals multiple relatives affected by various gastrointestinal and extraintestinal malignancies across several generations. Recognizing the specific extraintestinal manifestations is essential for identifying the underlying genetic disorder and initiating appropriate multisystem cancer screening. Match each hereditary gastrointestinal syndrome with its most characteristic extraintestinal manifestation or associated malignancy.

  • Peutz-Jeghers syndromeMucocutaneous pigmented macules on the lips, buccal mucosa, and digits
  • Gardner syndromeOsteomas, epidermoid cysts, and congenital hypertrophy of the retinal pigment epithelium
  • Turcot syndromeMalignant central nervous system tumors, primarily medulloblastoma or glioblastoma
  • Lynch syndromeHigh risk of endometrial, ovarian, and urothelial tract carcinomas

Cevap

Peutz-Jeghers matches with mucocutaneous pigmented macules; Gardner matches with osteomas and retinal hypertrophy; Turcot matches with central nervous system tumors; Lynch matches with endometrial, ovarian, and urothelial carcinomas.
Each hereditary gastrointestinal syndrome has a distinct phenotypic presentation due to specific genetic mutations. Recognizing these extraintestinal manifestations is critical for confirming the diagnosis and implementing targeted, life-saving cancer screening.

Adım Adım Çözüm

1
Analyze the clinical scenario requirements.
The task requires correlating specific hereditary gastrointestinal syndromes with their classical extraintestinal manifestations.
Accurate syndrome identification dictates the appropriate multisystem screening protocols for the patient and their relatives.
2
Evaluate Peutz-Jeghers syndrome.
Matches with mucocutaneous pigmented macules on the lips, buccal mucosa, and digits.
This is the pathognomonic physical exam finding associated with STK11 gene mutations.
3
Evaluate Gardner syndrome.
Matches with osteomas, epidermoid cysts, and congenital hypertrophy of the retinal pigment epithelium.
These findings differentiate Gardner syndrome from classic familial adenomatous polyposis (FAP) despite sharing the same underlying APC gene mutation.
4
Evaluate Turcot syndrome.
Matches with malignant central nervous system tumors.
Turcot syndrome specifically defines the association between colonic polyposis and brain tumors, primarily medulloblastoma and glioblastoma.
5
Evaluate Lynch syndrome.
Matches with a high risk of endometrial, ovarian, and urothelial tract carcinomas.
Lynch syndrome involves mismatch repair gene mutations resulting in a wide array of extracolonic malignancies, with endometrial cancer being the most common.

Anahtar Kavram

Extraintestinal manifestations of hereditary gastrointestinal polyposis and nonpolyposis syndromes
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Konular

Gastroenterology and Hepatology

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