Another possibility that can explain the pain is pericarditis. It causes chest pain aggravated by laughing yawning and deep breathing and also causes radiation of pain to arms. Again an EKG, heat echo and chest X-ray is required. I think you should discuss these possibilities with your doctor.
Definition of atypiain medicine, atypia is an abnormality in cells tissue. If this is discovered at breast biopsy, removed 6 aug 2015 benign biopsies that show atypia indicate although the cells examined are not frankly malignant neither they entirely normal medical definition of atypism.
What is Kniest dysplasia? Kniest dysplasia: A rare genetic bone growth disorder characterized by dwarfism, enlarged joints and facial deformities. Kniest dysplasia is listed as a rare disease by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Kniest dysplasia, or a subtype of Kniest dysplasia, affects less than 200,000 people in the US population.