The role of ultrasound-guided tissue sampling techniques in the management of extra-ocular orbital lesions.

BACKGROUND

Multiple disease processes may arise within the orbit and imaging plays a vital role in the evaluation of such lesions. The anterior orbital contents are readily amenable to evaluation by ultrasonography. Furthermore, the modality can be used to guide tissue sampling (fine needle aspiration or core biopsy) and may obviate the requirement for invasive surgical biopsy.

METHODS

We carried out a retrospective review of ultrasound-guided fine needle aspirations/core biopsies of extra-ocular orbital lesions undertaken at our institution. The anatomical locations, sonographic appearances and sampling techniques were analysed.

RESULTS

There were 7 fine needle aspirations and 1 core biopsy carried out during the period analysed. Multimodality imaging was available in all cases. The majority of lesions were located in the region of the lacrimal gland. All procedures were well-tolerated and there were no post-procedure complications.

CONCLUSION

Many extra-ocular, orbital neoplasms are amenable to ultrasound-guided tissue sampling and the procedure is well tolerated. However, a clear understanding of orbital anatomy, differential diagnosis and technique is required to enable safe sampling. Furthermore, a collaborative, multimodality approach is imperative for optimal patient management.