Thymoma commonly presents with –
**Core Concept**
Thymoma is a type of tumor originating from the epithelial cells of the thymus, a gland located in the anterior superior mediastinum. The thymus plays a crucial role in the development and maturation of T-lymphocytes, which are a type of white blood cell essential for the immune system.
**Why the Correct Answer is Right**
Thymomas commonly present with symptoms related to the compression or invasion of adjacent structures, such as the superior vena cava, trachea, and brachial plexus. The most common presentation is **dyspnea** (shortness of breath), which occurs due to tracheal or bronchial compression. Other symptoms may include **chest pain**, **cough**, and **myasthenia gravis**, an autoimmune disease that affects the neuromuscular junction. The thymus is closely associated with the development of myasthenia gravis, and up to 10% of patients with thymoma will develop this condition.
**Why Each Wrong Option is Incorrect**
* **Option A:** Thymoma is not typically associated with hypercalcemia, which is more commonly seen in multiple myeloma or other malignancies.
* **Option B:** While some thymomas may present with lymphadenopathy, it is not the most common presentation.
* **Option C:** Thymoma is not typically associated with weight loss, which is more commonly seen in advanced malignancies.
**Clinical Pearl / High-Yield Fact**
A significant proportion of patients with thymoma will develop myasthenia gravis, making this a crucial association to remember for exam purposes.
**Correct Answer:** C. Dyspnea.