The mother of a 12-year-old girl was worried that her daughter is shorter when compared with her classmates. On examination, the child has a webbed neck, low hairline, and shield chest. A provisional diagnosis of Turner’s syndrome was made, which of the following is a likely finding to be seen in this patient?

Explanation

## Correct Answer: C. Bilateral small streak ovaries Turner syndrome (45,X or mosaic variants) is characterized by gonadal dysgenesis, the hallmark of which is **bilateral streak ovaries**—thin, fibrotic, non-functional gonadal remnants lacking normal follicles. The clinical triad of short stature, webbed neck, and shield chest in this 12-year-old girl is pathognomonic for Turner syndrome. The streak ovaries result from accelerated atresia of oocytes during fetal development; by puberty, these patients have absent or severely delayed menarche, infertility, and elevated FSH/LH levels. This is the most consistent and frequent gonadal finding in Turner syndrome, present in >90% of cases. The diagnosis is confirmed by karyotyping (45,X) or FISH. In Indian clinical practice, Turner syndrome is often diagnosed late (as in this case) because short stature is attributed to nutritional factors; however, the presence of characteristic skeletal and cardiac stigmata should raise suspicion. Streak ovaries are the pathognomonic gonadal manifestation and explain the reproductive phenotype in these patients. ## Why the other options are wrong **A. Subluxation of lens** — Lens subluxation is a cardinal feature of **Marfan syndrome** (fibrillin-1 mutation), not Turner syndrome. While Turner syndrome has skeletal features (short stature, webbed neck), it does NOT cause connective tissue defects affecting the lens zonules. This is an NBE trap pairing skeletal abnormalities with a genetic syndrome that has ocular manifestations, but the wrong genetic condition. **B. Aortic dissection** — Aortic dissection is a life-threatening complication of **Marfan syndrome** (cystic medial necrosis of the aorta) and **Ehlers-Danlos syndrome**, not Turner syndrome. Although Turner syndrome does carry increased risk of aortic stenosis and coarctation of the aorta, acute aortic dissection is not a typical or expected finding. This option conflates Turner syndrome with other connective tissue disorders. **D. Mitral valve prolapse** — Mitral valve prolapse is classically associated with **Marfan syndrome** and **Ehlers-Danlos syndrome**, not Turner syndrome. While Turner syndrome patients may have cardiac anomalies (bicuspid aortic valve, aortic stenosis, coarctation), MVP is not a characteristic finding. NBE uses MVP as a distractor to confuse students about which genetic syndrome causes which cardiac lesion. ## High-Yield Facts - **Streak ovaries** are the pathognomonic gonadal finding in Turner syndrome, present in >90% of cases and explain primary amenorrhea and infertility. - **45,X karyotype** (or mosaic variants like 45,X/46,XX) is the cytogenetic hallmark; diagnosis confirmed by karyotyping or FISH. - **Classic triad**: short stature, webbed neck, and shield chest; other features include low hairline, cubital valgus, and cardiac anomalies (coarctation, bicuspid aortic valve). - **Elevated FSH/LH** with low estrogen is the endocrine signature; menarche is absent or severely delayed, requiring hormone replacement therapy. - **Aortic coarctation** (not dissection) and **bicuspid aortic valve** are the most common cardiac lesions; hypertension screening is essential in Indian clinical practice. ## Mnemonics **TURNER = Gonadal Dysgenesis** **T**all stature (actually SHORT) | **U**terus (normal) | **R**enal anomalies | **N**eck (webbed) | **E**ars (low set) | **R**ibbon chest (shield). The key: **Streak ovaries** = no follicles, no estrogen, no periods. **Turner vs Marfan: Cardiac & Ocular** **Turner** = Aortic *coarctation* (not dissection), no lens issues. **Marfan** = Aortic *dissection*, *lens subluxation*, MVP. Use this to avoid NBE traps pairing Turner with Marfan features. ## NBE Trap NBE pairs Turner syndrome with features of Marfan syndrome (lens subluxation, aortic dissection, MVP) to test whether students can distinguish between genetic syndromes with overlapping skeletal features. The webbed neck and short stature may lure students toward connective tissue disorders, but Turner's cardinal gonadal finding is streak ovaries, not ocular or aortic dissection pathology. ## Clinical Pearl In Indian pediatric practice, Turner syndrome is frequently missed because short stature is attributed to malnutrition or growth hormone deficiency. The presence of webbed neck, shield chest, and delayed menarche should trigger karyotyping. Early diagnosis allows timely growth hormone and estrogen replacement therapy, improving final height and preventing long-term complications like osteoporosis and cardiovascular disease. _Reference: Robbins Ch. 5 (Genetic Disorders); Harrison Ch. 405 (Disorders of Sex Development); OP Ghai Ch. 2 (Genetic Disorders in Pediatrics)_