It was first proposed in 1965 that this respiratory insufficiency is most often due to injury of the lung rather than to the chest wall,  and a group led by J.K. Trinkle confirmed this hypothesis in 1975. Hence the modern treatment prioritizes the management of pulmonary contusion. Animal studies performed in the late 1960s and 1970s shed light on the pathophysiological processes involved in pulmonary contusion. Studies in the 1990s revealed a link between pulmonary contusion and persistent respiratory difficulty for years after the injury in people in whom the injury coexisted with flail chest. In the next decade studies demonstrated that function in contused lungs improves for years after the injury. References
External links

Chest Trauma - pulmonary contusion, trauma.org
Medical professionals have suggested that the term sebaceous cyst be avoided since it can be misleading. : 31  In practice, however, the term is still often used for epidermoid and pilar cysts. Additional images
See also
Intracranial epidermoid cyst
List of cutaneous neoplasms associated with systemic syndromes
Proliferating epidermoid cyst
Verrucous cyst

References
External links

DermNet lesions/cysts