Late recurrence of post-dural puncture headache.

The term post-dural puncture headache (PDPH) refers to a common complication that occurs after accidental dural puncture. One of the diagnostic symptoms of PDPH is a postural headache, which worsens dramatically while sitting or standing and is relieved mostly by lying down. This symptom is caused by a cerebrospinal fluid (CSF) leak, leading to decreased CSF pressure or low CSF volume, which provokes a shift of intracranial contents and traction on pain-sensitive structures in the upright position. PDPH is commonly a self-limited condition and remits spontaneously within 2 weeks, or becomes less severe after surgical intervention to seal the leak with autologous epidural blood patch (EBP). Although recurrence of spontaneous intracranial hypotension following an EBP is not rare, spontaneously late recurrence of PDPH has been rarely reported. The purpose of this paper is to discuss this case with late recurrence of PDPH after 10 months following EBP.

Sarcoidosis mimicking metastatic breast cancer in a patient with early-stage breast cancer.

Sarcoidosis is a systemic granulomatous disorder of unknown origin that affects the lungs and mediastinal lymph nodes in most patients. The coexistence of sarcoidosis and breast cancer has been reported. An unfortunate consequence of the presence of both entities in the same patient is the risk of misdiagnosis. We report the case of a 70-year-old female with T1N0 cancer of the right breast that was initially diagnosed as stage IV because of mediastinal positron-emission tomography -positive lymphadenopathy. Biopsy of a mediastinal lymph node allowed us to diagnose sarcoidosis and correctly stage her disease as stage I breast cancer.

Lumbar multifidus muscle changes in unilateral lumbar disc herniation using magnetic resonance imaging.

OBJECTIVE: To assess multifidus muscle asymmetry using the cross-sectional area (CSA) and perpendicular distance of the multifidus muscle to the lamina (MLD) measurements in patients with nerve compression due to lumbosacral disc hernia. MATERIALS AND METHODS: In total, 122 patients who underwent microdiscectomy for unilateral radiculopathy caused by disc herniation, diagnosed by magnetic resonance imaging (MRI), were evaluated retrospectively. Posterolateral or foraminal disc herniation at only one disc level, the L3-4, L4-L5, or L5-S1 region, was confirmed using MRI. Subjects were divided by symptom duration: 1-30 days, (group A), 31-90 days (group B), and > 90 days (group C). There were 48 cases in group A, 26 in group B, and 48 in group C. RESULTS: In groups A, B, and C, the median MLD differed significantly between the diseased and normal sides (P < 0.05). The MLD increased on the diseased side with symptom duration by lumbar disc herniation. The diseased side MLD was 5.1, 6.7, and 7.6 mm in groups A, B, and C, respectively (P < 0.05). The cut-off values for the MLD measurements were 5.3 mm (sensitivity = 62.3%, specificity = 55.5%; P < 0.05). In groups A, B, and C, the median CSA of the multifidus muscle was not significantly different between the diseased and the normal side (P > 0.05). CONCLUSIONS: The MLD measurement correlated significantly with multifidus asymmetry in patients with lumbar disc herniation.

Prevalence of persistent median artery in carpal tunnel syndrome: sonographic assessment.

PURPOSE: This study investigated the frequency of persistent median artery (PMA) in patients with carpal tunnel syndrome (CTS) and controls. METHODS: A total of 84 CTS patient wrists, and 136 wrists of control subjects without CTS, were examined on ultrasonography (US) and color Doppler US (CDUS), and by electrophysiological evaluations. The frequency of PMA in CTS was evaluated. RESULTS: Of 84 CTS patient wrists, 2 (2.4 %) had a PMA (both on the right side). Of 136 control wrists, 12 (9 %) had a PMA, which was unilateral in eight (three right and five left), and bilateral in two, cases. There was no significant difference between the CTS patient and control groups with respect to the frequency of PMA (P > 0.05). CONCLUSIONS: There was no significant difference between the CTS patient and control groups in the frequency of PMA. We suggest that an ipsilateral PMA does not increase the risk of CTS.

Diagnostic value of T2*-weighted gradient-echo MRI for segmental evaluation in cerebral venous sinus thrombosis.

OBJECTIVE: We evaluated the diagnostic value of gradient-echo (GRE) imaging in patients with "cerebral venous and sinus thrombosis" (CVST). MATERIALS AND METHODS: In total, 130 thrombosed venous segment signal intensities in 45 patients with CVST were analyzed retrospectively using magnetic resonance imaging and magnetic resonance venography. RESULTS: The T2* GRE sequence had a diagnostic value for detecting acute and subacute superior sagittal sinus (SSS) thrombosis and thrombosis of the deep veins (DVs), and cortical veins (CVs; P<.05). CONCLUSIONS: The T2* GRE sequence had a high diagnostic value for detecting both acute and subacute SSS, DV, and CV thromboses.

Variations in apparent diffusion coefficient values following chemotherapy in pediatric neuroblastoma.

PURPOSE: In children the assessment of solid tumors' response to chemotherapy is based primarily on size reduction, which can be unreliable and a late marker, in the presence of necrosis. We aimed to establish whether apparent diffusion coefficient (ADC) values of childhood neuroblastomas show proportional changes in relation to chemotherapy response. METHODS: We evaluated 15 pediatric patients with abdominopelvic neuroblastomas, who had undergone MRI before and after chemotherapy. Two radiologists retrospectively analyzed all images by drawing a round uniform region-of-interest in the solid/contrast-enhancing portion of the lesions in consensus. The ADC values from pre- and postchemotherapy images were compared. RESULTS: Postchemotherapy ADC values were significantly higher than those obtained before treatment (P < 0.05, for minimum, maximum, and median ADC values). CONCLUSION: Our results support diffusion-weighted MRI as a promising noninvasive biomarker of therapeutic responses. To the best of our knowledge, this is the first report to compare diffusion- weighted imaging findings before and after chemotherapy in childhood neuroblastic tumors.

Multidetector computed tomography diagnosis of ileal and antropyloric gallstone ileus.

Gallstone-induced ileus is a rare complication of cholelithiasis, and gastric outlet obstruction is even rarer. We describe the multidetector computed tomographic diagnosis of small bowel obstruction resulting from a gallstone impacted in the distal ileum and of gastric outlet obstruction from a gallstone impacted in the pyloric antrum (Bouveret syndrome).

Factors associated with the thickness of the ligamentum flavum: is ligamentum flavum thickening due to hypertrophy or buckling?

STUDY DESIGN: Ligamentum flavum (LF) thickness was measured by using lumbar magnetic resonance imaging in patients with low back or leg pain. OBJECTIVE: This study investigated whether LF thickening is due to hypertrophy or buckling related to disc degeneration and examined the correlations between the thickness of the LF and age, sex, body mass index (BMI), degree of pain, lumbar spinal stenosis (LSS), and disc herniation. SUMMARY OF BACKGROUND DATA: "LF thickness" and "LF hypertrophy" are used interchangeably in the literature, although they are not necessarily the same thing. Thickness may increase by buckling without a change in the mass of the LF, and whether LF thickening is due to tissue hypertrophy or buckling remains controversial. METHODS: The thickness of 896 LFs at the L2-L3, L3-L4, L4-L5, and L5-S1 levels of 224 (mean age, 47.8 ± 16.7 yrs) patients was measured prospectively on axial T1-weighed magnetic resonance images, obtained at the facet joint level. The presence of disc degeneration, spinal stenosis, and disc herniation was evaluated. RESULTS: At all of the levels investigated, LF thickness was significantly greater in patients with grades IV to V degeneration compared with the patients with grades I to III degeneration (P < 0.05). LF thickness at all levels increased significantly with age (P < 0.05). Sex and the degree of pain were not correlated with the thickness of the LF. Patients with a BMI of 25 kg/m or greater had the thickest LF at the L3-L4 level (P < 0.01). LF thickness was significantly greater at the L2-L3, L3-L4, and L4-L5 levels in subjects with LSS and significantly greater at all levels in subjects with disc herniation (P < 0.05). CONCLUSION: Thickening of the LF is correlated with disc degeneration, aging, BMI, LSS, spinal level, and disc herniation. The authors concluded that thickening of the LF is due to buckling of the LF into the spinal canal secondary to disc degeneration more than to LF hypertrophy. Sex and the degree of pain were not correlated with the thickness of the LF.

Effects of respiratory manoeuvres on hepatic vein Doppler waveform and flow velocities in a healthy population.

OBJECTIVE: This study was performed to determine the variations in Doppler waveforms and flow velocity during respiratory manoeuvres in healthy individuals with no liver disease. MATERIALS AND METHODS: In total, 100 individuals (75 women and 25 men) without known cardiac or liver disease were examined prospectively with duplex Doppler ultrasonography (US). We recorded the Doppler waveforms and peak systolic velocities (V(max)) of the middle hepatic vein during normal respiration, during breath-holding after quiet expiration and also during deep inspiration. Doppler waveforms are categorised as triphasic, biphasic or monophasic. RESULTS: During normal respiration, hepatic venous waveforms were triphasic in 93% of subjects, monophasic in 6% and biphasic in 1%. During breath-holding after quiet expiration, the percentages were 91%, 6% and 3%, respectively. During deep inspiration, they were 80%, 18% and 2%, respectively. Although significant differences were noted between rates during deep inspiration and normal respiration, they were quite similar during normal respiration and breath-holding after quiet expiration (P<0.05). The values of V(max) were significantly higher during normal respiration compared to quiet expiration and during quiet expiration compared to deep inspiration (P<0.05). CONCLUSION: The velocities and waveforms of hepatic veins varied during respiratory manoeuvres. The status of respiration must be taken into consideration whilst examining the hepatic vein waveforms and velocities with duplex Doppler US.