The patient underwent surgical drainage of the cyst using a 22-gauge Angiocath (Becton, Dickinson, and Co, Franklin Lakes, New Jersey). Approximately 1 mL of material was aspirated and sent for pathological examination. A glass syringe filled with 0.5 mL of 20% TCA was attached to the Angiocath. The remainder of the cyst fluid was aspirated into the glass syringe and mixed with the TCA. This mixture was then reinjected into the cyst approximately 5 times to adequately lavage the cystic cavity. Finally, the empty cystic space was irrigated copiously with BSS Plus (Alcon Laboratories, Inc, Forth Worth, Texas). Indirect ophthalmoscopy confirmed that the posterior aspect of the cyst was completely drained. Microscopical examination of the cyst aspirate showed scattered debris and fragments of keratin.