X-rays and scans can fail to differentiate hip pathology from lumbar spinal stenosis: Two case reports

Ravindra Singh; Hyeun-Sung Kim; Nitin Adsul; Osama Nezar Kashlan; Sung Woon Oh; Jung Hoon Noh; Soeng Cheol Moon; Chang Hwan Park; Il Tae Jang; Seong Hoon Oh

doi:10.25259/SNI_173_2019

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Case Report

2019

:10;

165

doi:

10.25259/SNI_173_2019

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X-rays and scans can fail to differentiate hip pathology from lumbar spinal stenosis: Two case reports

Ravindra Singh¹, Hyeun-Sung Kim², Nitin Adsul³, Osama Nezar Kashlan⁴, Sung Woon Oh², Jung Hoon Noh², Soeng Cheol Moon⁵, Chang Hwan Park⁶, Il Tae Jang², Seong Hoon Oh²

1Department of Orthopaedics and Spine, Private Practice, Jaypee Hospital, Noida, Uttar Pradesh,

2 Departments of Neurosurgery Nanoori Hospital, Seoul, Republic of Korea,

3Department of Ortho-Spine Surgery, Sir Ganga Ram Hospital, New Delhi, India,

4Department of Neurosurgery, University of Michigen, Michigen, United States,

5 Departments of Orthopaedics, Nanoori Hospital, Seoul, Republic of Korea,

6Medical School, Medical School University of Debrecen, Debrecen, Hungary.

*Corresponding author: Hyeun-Sung Kim, Department of Neurosurgery, Nanoori Hospital, 731, Eonju-ro, Gangnam-gu, Seoul 16503, Republic of Korea. neurospinekim@gmail.com

Received: 2019-03-05, Accepted: 2019-06-26, Published: 2019-08-23

Licence

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-Share Alike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.

How to cite this article: Singh R, Kim HS, Adsul N, Kashlan ON, Oh SW, Noh JH, et al. X-rays and scans can fail to differentiate hip pathology from lumbar spinal stenosis: Two case reports. Surg Neurol Int 2019;10:165.

Abstract

Background:

Occasionally, hip pathologies may present alone or combined with lumbar spine pathology, especially lumbar stenosis. Although the history and clinical examination may help differentiate between the two, hip X-rays alone without accompanying magnetic resonance imaging (MRI) studies may prove unreliable.

Case Descriptions:

Case 1 – A 72-year-old male presented with the sudden onset of severe back and left posterior thigh pain. Straight leg raising test was positive at 70° (right) and 60° (left), and he had left lower extremity numbness and weakness. The lumbar MRI showed L5-S1 spinal stenosis. Although X-rays of both hips were negative, the MRI showed bilateral femoral neck fractures. He underwent screw fixation of the hip fractures and later underwent endoscopic decompression of the spinal stenosis. Case 2 – A 35-year-old male presented with low backache and right hip pain of 1 month’s duration. The neurological examination was normal, except for positive straight leg raising bilaterally at 60°. The spine MRI was normal. However, despite negative X-ray of both hips, the hip MRI revealed avascular necrosis (AVN) of both femoral heads requiring subsequent orthopedic management.

Conclusion:

Hip pathology may mimic lumbar spinal stenosis. In the two cases presented, plain X-rays failed to document hip fractures (case 1) and AVN (case 2), respectively, both of which were later diagnosed on MRI studies.

Keywords

Avascular necrosis

Backache

Femoral head

Fracture

Hip

Neck of femur

Spinal stenosis

Spine

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INTRODUCTION

Some patients with what appears to be lumbar spinal stenosis, with/without positive magnetic resonance imaging (MRI) studies, may have hip disease. However, hip X-rays alone may fail in certain circumstances, to document hip significant pathology. Here, we present two such cases, in which bilateral femoral head fractures (case 1) and avascular necrosis (AVN) (case 2) were missed on X-rays alone but ultimately diagnosed on MRI examinations.

CASE REPORTS

Case 1

A 72-year-old male presented with the sudden onset of severe back (visual analog scale [VAS] 10) and the left posterior thigh pain (VAS score 7) following a fall 2 months ago. Straight leg raising test was positive on the right at 70º and 60º on the left; findings also included a partial left foot drop (dorsiflexion 3/5) with L5 hyperesthesias. The lumbar MR showed L5-S1 stenosis [Figure 1]. Although X-rays of both hips were negative, the MRI and computed tomography studies both demonstrated bilateral hip fractures [Figure 2]. The patient, therefore, first underwent bilateral hip joint fixation with cannulated cancellous screws followed by endoscopic lumbar decompression at the L5-S1 level [Figure 3]. Six months later, the patient was asymptomatic.

Case 2

A 35-year-old male patient presented with low backache and right hip pain (VAS 7) of 1 month’s duration following an insignificant traumatic event. Straight leg raising test was positive at 60° bilaterally, but the neurological examination was normal. Both spine X-rays and the lumbar MRI were normal. X-rays of both hips were negative, but the MRI of studies showed Ficat Stage I of AVN of both femoral heads [Figures 4 and 5]. The patient was referred to orthopedics for the management of the AVN.

DISCUSSION

Differentiation between hip and spine pathology may sometimes be difficult.[6] Here, we present two patients who respectively may had: (1) both spinal stenosis and hip disease and (2) hip disease alone.

Hip disease “missed” on X-rays alone but diagnosed with MR

As demonstrated in the two cases presented, X-rays alone may have “missed” hip pathology. In both cases, hip fractures and AVN were diagnosed on MRI scans.[1,4,5,6,9] In the first case, following bilateral hip fusions, the patient underwent an L5-S1 decompression. In the second case, the lumbar MRI was negative, the hip X-rays were negative, but the MRI documented bilateral AVN of the femoral neck (e.g., in the initial stages) appropriately treated by orthopedics’ surgeon.[2,3,7,8]

CONCLUSION

Hip disease can mimic spinal stenosis. In certain cases, hip X-rays may be negative, but hip MR scans may be warranted to document other significant hip pathology as in these two cases involving bilateral hip fractures and AVN, respectively.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form, the patient has given his consent for his images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

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