Overview
The term 'Y chromosomal anomaly' was previously used as a broad category in medical databases to describe a range of conditions involving changes or differences in the Y chromosome. This entry has been marked as OBSOLETE in the Orphanet classification, meaning it is no longer used as a standalone diagnosis. Instead, specific Y chromosome conditions are now classified under their own individual entries with more precise names. The Y chromosome is one of the two sex chromosomes (X and Y). It is typically found in males and plays a key role in male sexual development. Anomalies of the Y chromosome can include extra copies of the Y chromosome (such as 47,XYY syndrome), structural changes like deletions or rearrangements, or other variations. These changes can affect growth, fertility, hormone levels, and sometimes learning or behavior. Because this is an obsolete umbrella term, patients who were previously given this label should work with a clinical geneticist to determine their specific diagnosis. Each specific Y chromosome condition has its own set of symptoms, prognosis, and management strategies. Modern genetic testing can now pinpoint the exact nature of the chromosomal change, leading to more accurate diagnosis and better-tailored care.
Key symptoms:
Tall statureInfertility or reduced fertilityDelayed puberty or incomplete pubertyLearning difficultiesSpeech and language delaysLow muscle toneBehavioral differences such as impulsivityAmbiguous or atypical genitalia in some casesSmall testesLow testosterone levels
Variable
Can be inherited in different ways depending on the underlying gene
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for OBSOLETE: Y chromosomal anomaly.
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Specialists
View all specialists →No specialists are currently listed for OBSOLETE: Y chromosomal anomaly.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to OBSOLETE: Y chromosomal anomaly.
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Caregiver Resources
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Social Security Disability
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Questions for your doctor
Bring these to your next appointment
- Q1.What is the exact type of Y chromosome change my child or I have?,How might this specific condition affect growth, development, and fertility?,Should we see a pediatric endocrinologist or reproductive specialist?,Are there any developmental screenings or therapies we should start now?,Will hormone therapy be needed, and if so, when should it begin?,What are the options for fertility in the future?,Should other family members be tested?
Common questions about OBSOLETE: Y chromosomal anomaly
What is OBSOLETE: Y chromosomal anomaly?
The term 'Y chromosomal anomaly' was previously used as a broad category in medical databases to describe a range of conditions involving changes or differences in the Y chromosome. This entry has been marked as OBSOLETE in the Orphanet classification, meaning it is no longer used as a standalone diagnosis. Instead, specific Y chromosome conditions are now classified under their own individual entries with more precise names. The Y chromosome is one of the two sex chromosomes (X and Y). It is typically found in males and plays a key role in male sexual development. Anomalies of the Y chromoso