B Scan of Orbit with Its Clinico-Surgical Correlation
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2019, Vol 18, Issue 1
Abstract
Aims and objectives- To evaluate role of USG in orbital and extra-orbital diseases. Materials and methods- It was a hospital based, observational, descriptive study with a sample size of 144 cases during a period of 1.5yrs in the department of radiology of Seth G.S Medical college and KEM Hospital, Mumbai. Patients undergoing B-scan as advised by their treating physicians were included in this study. Results-In our study, 144 patients underwent B scan for diagnosing various pathologies of the orbit out of which 135 patients were positive for ocular pathology and 9 patients were normal. Out of 119 cases of intraocular pathologies, 32(23.7%) patients had vitreous hemorrhage followed by the retinal detachment which was seen in 25(18.5%) patients. 12(8.8%) patients had Vitreous detachment, 10(7.4%) patients had endophthalmitis. There were total 16(11.8%)cases of extraocular pathologies, thyroid ophthalmopathy was the commonest extraocular pathology seen in 8(5.9%) patients, followed by a pseudo tumor seen in 7(5.1%) patients. B scan was normal in 9 (6.6%)cases, these cases had opaque media (corneal opacity), B scan was performed to rule out posterior segment pathologies. Color Doppler was used simultaneously in all cases to see the vascularity of the different pathologies. Color Doppler imaging was very effective in the detection of the vascular lesions of the orbit like lidhemangioma,thyroid ophthalmopathy, retinal detachment and ocular tumors like retinoblastoma and melanoma. Out of 32(23.7%) patients with history of trauma, vitreous hemorrhage was the commonest finding in trauma followed by retinal detachment. There is 100% accuracy of the B-scan in diagnosing intraocular tumors, retinoblastoma is most common in pediatric age and melanoma in the adult population.. B scan of the orbit has limited value in assessing orbital masses with intracranial extension and the involvement of the bones. Cross sectional imaging CT scan and MRI are better in diagnosing intracranial extension and involvement of bone. Conclusions-B- scan is quick technique and allows fast evaluation of orbit and it provides valuable information in the short time. B-scan with dynamic imaging technique gives us real time images of lesions with respect to ocular movements. B scan is cost-effective and non-invasive imaging modality and best tool for follow up of many ocular pathologies. It is free of ionizing radiation and requires no contrast agents as required in the cross sectional imaging techniques like CT and MRI. It is a sensitive and accurate diagnostic technique for vitreo-retinal pathologies, ocular neoplasms like retinoblastoma, melanoma and patients with trauma. B scan is accurate in detecting and localizing foreign bodies. It plays a key role in emergency conditions and for management of ocular trauma. Color Doppler Imaging is an important part of the evaluation of the various ocular pathologies like retinal detachment, vascular lesions like hemangioma, lymphangioma. It is a very effective imaging modality in conditions with opaque media where indirect ophthalmoscopy is not possible for pathologies of the posterior segment of the globe.
Authors and Affiliations
Dr. Hemangini Thakkar, Dr. Padma Badhe, Dr. Sagar Sonone, Dr. Dasari Ravi Kiran
Keywords
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- EP ID EP431036
- DOI 10.9790/0853-1801040116.
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