/ Design Patterns. In software engineering, creational design patterns are design patterns that deal with object creation mechanisms, trying to create objects in a manner suitable to the situation. The basic form of object creation could result in design problems or added complexity to the design.
1 Gastroenterologist-specializes in diseases of the digestive system. 2  Geriatrician (Geriatric Medicine) - general practice physician who specializes in caring for older adults. 3  Hematologist-a hematologist specializes in diseases of the blood and bone marrow. 4  Hepatologist-specializes in diseases of the liver.
Pulmonologist. A pulmonologist is a doctor who specializes in treating diseases of the lungs, such as lung cancer, COPD, and tuberculosis. With cancer, a pulmonologist aids in diagnosis and treatment.They are also called pulmonary specialists.any types of doctors are involved in diagnosing and treating lung cancer. Your primary care doctor may refer you to various specialists whose titles may be unfamiliar to you. Here are a few types of specialists you may meet and the roles they play in lung cancer diagnosis and treatment.