Possible Symptoms that one who has Klinefelter Syndrome may have. Since this is a spectrum condition, some may have some of these or only the first one. We all have one or more extra X chromosomes, which is what makes us XXY. Klinefelter Syndrome can occur, but not necessarily.
| **At least one extra X Chromosome** | Anxiety | Attention Deficit Disorder (ADD/ADHD) |
| Auditory Processing Disorder | Behavioral Issues | Chest pains accompanied by difficulty breathing |
| Decreased Stamina | Delayed Onset of Puberty | Depression |
| Developmental Delays | Emotional Issues/Cries Easily | Excessive Fatigue |
| Feeling Socially Inadequate | Fifth Finger Clindactily | Flat Feet |
| Focus and Concentration Issues | Gynecomastia/breast tissue enlargement | Impulsiveness |
| Infertility/Lack of Sperm | Lack of Body/Facial Hair | Learning Differences/Language Impairment |
| Low Tone/Hypotonia | Never Takes Responsibility | Obsessive Compulsive Disorder |
| Obstructive/Central Sleep Apnea | Osteoporosis | Pear Shaped Body |
| Pectus Excavatum/Concave Chest | Poor Executive Skills | Possible Focal Seizures |
| Possible Migraines | Respiratory Disorders | Sensory Integration Dysfunction |
| Shy | Small Testes/Genitalia | Secondary Female Sex Characteristics |
| Some feelings of Sexual Confusion/Identity | Some feelings of being Intersex | Speech Delay |
| Tall Stature | Taurodontism/dental issues | Tremors - Hand/Leg |
Newborn Specific Symptoms
Ambiguous Genitalia
Hypospadias
Undescended Testicles
