Ovarian Teratoma Masquerading as a CSF Pseudocyst in a Female with a Ventriculoperitoneal Shunt

Figure 1

In figures (1a-1c), an abdominal ultrasound shows a large, walled, and multiseptated fluid collection. A small portion of the shunt catheter appears to be within this fluid collection, and thus the lesion was felt to be consistent with a pseudocyst, or CSFoma. In figures (1d-1f), a CT with IV contrast shows the same complex, multiseptated $16\mathrm{\hspace{0.17em}\hspace{0.17em}}\times 8\mathrm{\hspace{0.17em}\hspace{0.17em}}\times 17$ cm pelvic mass emanating from the right ovary, with the distal shunt tubing draped circumferentially around the lesion, indicating that the shunt was not responsible. Surgical exploration leads to the diagnosis of teratoma.