Borderline personality disorder (BPD), also known as emotionally unstable personality disorder (EUPD), is a personality disorder characterized by a long-term pattern of unstable interpersonal relationships, distorted sense of self, and strong emotional reactions. Those affected often engage in self-harm and other dangerous behaviors, often due to their difficulty with returning their emotional level to a healthy or normal baseline. They may also struggle with a feeling of emptiness, fear of abandonment, and detachment from reality. Symptoms of BPD may be triggered by events considered normal to others. BPD typically begins by early adulthood and occurs across a variety of situations. Substance use disorders, depression, and eating disorders are commonly associated with BPD. Some 8 to 10% of people affected by the disorder may die by suicide. The disorder is often stigmatized in both the media and the psychiatric field and as a result is often underdiagnosed.The causes of BPD are unclear but seem to involve genetic, neurological, environmental, and social factors. It occurs about five times more often in a person who has an affected close relative. Adverse life events appear to also play a role. The underlying mechanism appears to involve the frontolimbic network of neurons. BPD is recognized by the American Diagnostic and Statistical Manual of Mental Disorders (DSM) as a personality disorder, along with nine other such disorders. The condition must be differentiated from an identity problem or substance use disorders, among other possibilities.BPD is typically treated with psychotherapy, such as cognitive behavioral therapy (CBT) or dialectical behavior therapy (DBT).
Segmental odontomaxillary dysplasia is a painless, unilateral enlargement of the upper jaw. The cause is unknown, and the disease affects the jaws, teeth, and adjacent soft tissue. The premolars may be congenitally missing, and the primary teeth (baby teeth) may be smaller than usual. It is a relatively recent discovery. Description
It is a rare developmental disorder that affects maxilla, also known as the upper jaw in most vertebrates. The disorder is often diagnosed in early childhood. Since its original description as hemimaxillofacial dysplasia by doctors in 1987, less than 40 cases have been reported in the English literature. Epidiomology
All cases reported appear to represent sporadic occurrence. There is no specific inheritance pattern. The male-to-female ratio of affected is 1.8:1 and is often diagnosed before the age of 9. The disorder affects the right and left sides of the maxilla almost equally. References

Kahn, Michael A. Basic Oral and Maxillofacial Pathology. Volume 1. 2001.