system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
During a humanitarian mission to southeast Asia, a 42-year-old man is brought to the outpatient clinic for a long history (greater than 2 years) of progressive, painless, enlargement of his scrotum. The family history is negative for malignancies and inheritable diseases. The personal history is relevant for cigarette smoking (up to 2 packs per day for the last 20 years) and several medical consultations for an episodic fever that resolved spontaneously. The physical examination is unremarkable, except for an enlarged left hemiscrotum that transilluminates. Which of the following accounts for the underlying mechanism in this patient's condition?
assistant
Decreased lymphatic fluid absorption