True thyrnic hyperplaisa is characterized by massive thymic hypertrophy however, the normal thymic architecture is retained3. Massive thyrnic hyperplasia (MTH), a rare variant of hyperplasia of the thymus, is known to cause mediastinal compression or acute and recurrent respiratory infections in the pediatric age group. It needs to be distinguished from other commonly seen masses of the anterior mediastinum2.
Defining the Scope of Your Problem. Before you begin troubleshooting a problem, you must first define the scope of your problem. When defining the scope, you need to identify what is working and what is not working. Sometimes it is useful to identify another machine that is working as you expect.
1 Define the problem. 2  With the information in front of you, you're ready to write down a problem statement - a comprehensive definition of the problem. 3  Before you do, remember two general principles: 4  Define the problem in terms of needs, and not solutions. Define the problem as one everyone shares; avoid assigning blame for the problem. 2  This is particularly important if different people (or groups) with a history of bad relations need to be working together to solve the problem.