21-year-old male with swelling over the lumbar spine area. Assess fluid collection. There is an approximately 3.2 x 0.4 x 0.9 cm uncomplicated fluid collection. There are some internal echoes. There is posterior acoustic shadowing. The fluid collection is very well-defined. Its depth is about 0.4 cm. It is approximately 0.2 cm from the skin surface.
1. Nonspecific fluid collection in lower back as described above.