Superior PC or chondromanubrium (pouter pigeon or Currarino & Silverman syndrome): It consists of upper protrusion of the sternal notch that is proximal to midsternum and lower pseudo depression. It is subdivided to upper PC with midsternum depression and without midsternuml depression [11].

Clinically the deformity presents a typical progressive growth and can be accompanied by cardiovascular and respiratory symptoms similar to PE. These usually include palpitations, dyspnoea, wheezing with exertion and reduced exercise tolerance. Usually the cardiac and pulmonary function are less implicated than in PE but psychological effects of PC can be severe and responsible for low self esteem [12] leading to the necessity of a surgical correction.