Dear Machelle: Complex cysts describe a structure that is less well defined than a simple cyst with ultrasound. They may contain thick fluid, or fluid that contains dead cells. An
aspirationAspiration
Bone marrow aspiration
Joint aspiration
Lung needle biopsy
Meconium aspiration syndrome
Skin lesion aspiration
Synovial fluid analysis
Thoracentesis is usually recommended to make sure the cyst is not solid. Any suspicious appearing fluid would be sent to the laboratory for analysis. In general, cysts are
benignBenign ear cyst or tumor
Benign positional vertigo. Complex cysts require more evaluation to be sure that they are, in fact, cysts. Often, people will have a cyst, it is aspirated, and then it is gone. However, some people have recurrent cysts and those people can have frequent recurrences. It is impossible to tell, from your description, whether this is, in fact a cyst. We would recommend that you have your doctor take a look.