Biomedical subjects

Halil Arslan

Publications and source records attributed to Halil Arslan.

15 recordsLinked to original sources

PubMed2006

Radiological and clinical course of pneumonia in patients with avian influenza H5N1.

INTRODUCTION: We evaluated chest X-ray and clinical findings of patients with lower respiratory tract infection due to influenza H5N1 and presented the radiological findings and clinical course of the infection. MATERIALS AND METHODS: Between December 2005 and February 2006, eight hospitalized patients (median age 10, 5-15 years) with avian-flu were evaluated in this study. All patients were evaluated with chest X-ray and four of them with CT scan. Post mortem pathological characterization were also available for three of the patients. RESULTS: A rapidly progressive pneumonia with high mortality rate was observed especially for cases with late admission. The major radiologic abnormalities were extensive pneumonic infiltration with segmental and multifocal distribution, mostly located in lower zones of the lung. No pleural effusion and hilar lymphadenopathy was noted. CONCLUSION: Avian flu may be presented as rapidly progressive pneumonia. The chest radiography has an important role in diagnosis and should be obtained daily because of rapid change of the findings that may necessitate prompt action.

Adolescent↗

PubMed2006

Right renal stone on the trajectory of upper left ureter.

We report a 52-year-old woman with a right renal pelvic stone, mimicking a left upper ureteral stone in a kidney-ureter-bladder film. Computed tomography detected the exact anatomical location of the stone, which was not possible by intravenous urography and ultrasonography. In this study, we discuss diagnostic modalities of the urinary calculi in the light of the literature.

Diagnosis, Differential↗

PubMed2005

Contrast-enhanced CT and MRI findings of atypical hepatic Echinococcus alveolaris infestation.

Diagnosis of liver infestation by Echinococcus alveolaris (EA) is based on serological and radiological findings. In this report, we present a 15-year-old girl with atypical hepatic EA infestation showing central punctate calcifications and contrast enhancement on the portal and late phases of CT and MRI. CT showed a hypodense mass involving more than half of the liver with prominent central calcifications. MRI revealed hypointense signal of the infiltrative mass on both T1- and T2-weighted images. Contrast enhancement is a unique finding in hepatic EA infestation that may cause difficulties with diagnosis. MRI may provide invaluable information in the diagnosis of EA infestation of the liver, either by disclosing the infiltrative pattern of infestation without significant effect to vascular structures, or by the signal characteristics.

Adolescent↗

PubMed2005

Incidence of retro-aortic left renal vein and its relationship with varicocele.

The retro-aortic left renal vein (RLRV) is a malformation characterized by the presence of a vessel that drains the left renal blood up to the inferior vena cava crossing behind the aortic artery. Varicocele is defined as venous dilation of the pampiniform plexus, and the left side is the most commonly affected. Several theories concerning the possible aetiology of varicocele are reviewed in the literature, but RLRV was not mentioned as an aetiologic factor of varicocele. in this study we investigated the percentage of RLRVs and their relation with varicocele. A total of 1,125 contrast-enhanced abdominal CT scans was examined to identify RLRVs. RLRVs were found in nine women (1.6%) and ten men (1.7%). We performed scrotal Doppler ultrasonography (US) for all affected men except one. Varicocele of varying degrees was found in seven of the nine male patients with RLRV (77%). RLRV could be one of the aetiological factors in the development of varicocele, and the cases with RLRV should be examined by scrotal Doppler US for the presence of varicocele.

Adult↗

PubMed2005

The role of the MR-fluoroscopy in the diagnosis and staging of the pelvic organ prolapse.

INTRODUCTION: The aim of the study is to investigate the efficacy of the magnetic resonance fluoroscopy in the diagnosis and staging of the pelvic prolapse. MATERIALS AND METHODS: The study consisted of 46 patients who were known to have pelvic prolapses from their vaginal examination. Thirty women who underwent vaginal exam and shown not have pelvic prolapse were selected as a control group. Firstly, pelvic sagittal FSE T2 weighted images of all the women were acquired in 0.3 T open MR equipment than sagittal MR-fluoroscopic images using spoiled gradient echo sequences were obtained during pelvic strain. Physical examination and MR-fluoroscopic findings were compared. The relationship between the stages of prolapse established by both of the methods was evaluated statistically with Pearson's correlation analysis. RESULTS: Physical examination and MR findings were very concordant in the diagnosis of pelvic prolapse and statistical correlations in the stages of prolapse were established between both of the methods (P<0.01 for anterior and middle comportment, P<0.05 for posterior comportment). CONCLUSION: We conclude that MR-fluoroscopy is a non-invasive, easily applied, dynamic useful method without contrast agent in the diagnosis and staging of pelvic organ prolapse.

Adult↗

PubMed2005

Peroral CT enterography with lactulose solution: preliminary observations.

OBJECTIVE: The objective of our study was to evaluate lactulose solution as a new oral contrast agent with the use of peroral CT enterography to determine the adequacy of luminal distention and conspicuity of the bowel wall. CONCLUSION: Peroral CT enterography performed with lactulose solution is a simple and noninvasive method of evaluating the small bowel by obtaining good distention. It can also be used at routine abdominal examinations as a negative contrast agent instead of iodinated oral contrast medium, especially for CT angiography.

Administration, Oral↗

PubMed2004

Popliteal artery pseudoaneurysm: a rare complication of brucellosis.

Brucellosis is still a public health problem, particularly in developing countries. After the primary infection subsides, a chronic stage characterized by nonspecific manifestations can develop, during which it may not be possible to isolate Brucella organisms and agglutination test titers may or may not be high. We present the case of a 49-year-old man who had only nonspecific symptoms and a 2-month history of a pulsatile painful swelling in his right popliteal region. He had no history of trauma or surgery in that region, but he did ingest unpasteurized milk products. The patient's agglutination test titers were high, and Brucella melitensis was isolated from a bone marrow culture. Color Doppler sonography, T2-weighted MRI, and digital subtraction angiography were performed. Treatment with ultrasound-guided compression of the pseudoaneurysm failed because of high blood flow in its neck. Aneurysmectomy was undertaken, and the excised material was consistent with that from a mycotic pseudoaneurysm. Although both MRI and angiography provided useful information, the color Doppler sonography findings were characteristic of a pseudoaneurysm in the popliteal artery, and only that modality could detect the flow dynamics within the pseudoaneurysm.

Aneurysm, False↗

PubMed2004

Monostotic fibrous dysplasia originating from ethmoid bone: treatment with endoscopic approach.

We present a case of monostotic fibrous dysplasia of the ethmoidal sinus in an 11-year-old boy. This condition is of interest to the otorhinolaryngologist because of the difficulty of differential diagnosis and treatment. This tumorlike growth was not restricted to the right ethmoidal sinus, but also compressed the orbit and the globe. Endoscopic and transnasal removal of the mass with a drill was performed under general anesthesia. No residual tumor was observed 6 months later.

Child↗

PubMed2003

Fibrosing mediastinitis and thrombosis of superior vena cava associated with Behçet's disease.

We present CT, MRI and venography findings in 13-year boy with mediastinal fibrosis and superior vena cava (SVC) thrombosis associated with Behçet's disease. Fibrosing mediastinitis is an excessive fibrotic reaction that occurs in the mediastinum and may lead to compression of mediastinal structures (especially vascular). This condition is usually idiopathic, though many (and perhaps most) cases in the USA are thought to be caused by an abnormal immunologic response to Histoplasma capsulatum infection. SVC syndrome secondary to extrinsic compression by mediastinal fibrosis combined with Behçet's disease has rarely been described. Radiological investigations of this syndrome are necessary to avoid a useless anticoagulant therapy.

Adolescent↗

PubMed2003

[Uterine leiomyoma embolization: Role of power Doppler ultrasonography].

PURPOSE: The vascularity of uterine leiomyoma was evaluated by power Doppler ultrasonography (PDUS) before and after bilateral uterine artery embolization (UAE) in order to establish the efficacy of the procedure and contribution to the treatment. MATERIALS AND METHODS: UAE was performed in 20 symptomatic patients with uterine leiomyoma. In addition to MRI and gray scale US, patients were evaluated by PDUS to assess the vascularity of the uterus and leiomyomas before and 6 months after the embolization and the findings were compared with angiography. Vascularity was categorized into 3 groups as mild (5 cases), moderate (7 cases) and marked (8 cases). Relationship between the findings of PDUS and treatment results were analyzed statistically by one-way ANOVA and post-hoc Tukey tests. RESULTS: In PDUS except their calcified and degenerated regions leiomyomas displayed more vascularity peripherally than centrally, before the embolization. Six months after the embolization, a decrease of 37%, 44% and 59% was observed in the mass of the leiomyomas that had revealed mild, moderate and marked vascularity before the embolization. Greater mass reduction occurred in leiomyomas with high pre-embolization vascularity (p < 0.05). CONCLUSION: PDUS gives important information about the vascularity of uterine leiomyomas before and after uterine artery embolization, which became a widespread treatment option in recent years. It can be helpful in the selection of patients for uterine artery embolization by revealing the vascularity of the leiomyomas. Also it is a non-invasive and cheap method in the determination of the efficacy of the procedure in the early and late periods after embolization.

Adult↗

PubMed2002

Two giant cavernous hemangioma caused cavernous transformation of the portal vein in a pregnant woman.

We report a case with two giant hemangiomas of the liver that caused cavernous transformation of the portal vein in a 45-yr-old full term pregnant woman. The patient had no serious complaints other than a mass and slight pain in the right upper quadrant and there were no abnormalities in laboratory values. Delivery was performed without complication. In the six month follow-up period, no changes were seen in the lesions.

Journal Article↗

PubMedDate not supplied

Hepatic cavernous hemangiomas: patterns of contrast enhancement on MR fluoroscopy imaging.

PURPOSE: The purpose of this study was to assess the patterns of contrast enhancement of hepatic hemangiomas on gadolinium-enhanced MR fluoroscopy imaging prospectively. METHOD: Investigation was performed on a 0.3-T open MR unit. Gadolinium-enhanced MR fluoroscopy images were obtained in 24 patients with 28 hepatic hemangiomas. Each MR fluoroscopy image was obtained in 2 s and MR fluoroscopy lasted for 10-25 min for each investigation. RESULTS: Three patterns of contrast enhancement were observed in 24 patients on MR fluoroscopy images. Four small lesions were not detected on MR fluoroscopy images. Uniform enhancement was seen in nine lesions (29%), peripheral nodular enhancement progressing centripetally to uniform enhancement was seen in nine lesions (29%), and peripheral nodular enhancement with persistent central hypointensity was seen in six lesions (22%). CONCLUSION: Enhanced MR fluoroscopy technique could obtain dynamic images of hepatic hemangiomas. It can be suggested as a useful technique for the showing of enhancement of hepatic hemangiomas, keeping in mind its low sensitivity in the diagnosis of small hemangiomas.

Adult↗

PubMedDate not supplied

Frequency of sinusitis in the patients with pneumonia.

The aim of this study was to investigate the frequency of sinusitis in patients with pneumonia. Among 50 consecutive patients with pneumonia, 19 cases, which had Waters' roentgenograms in their files, were retrospectively reviewed in relation with sinusitis. Sixteen of them had sinusitis signs in their roentgenograms. The sinusitis frequency was 84% in patients with pneumonia who had paranasal sinus roentgenograms. These findings suggest that sinusitis may be an important causative factor for pneumonia and that it should be considered when evaluating a patient with pneumonia.

Adult↗

PubMedDate not supplied

MR arthrography in chondromalacia patellae diagnosis on a low-field open magnet system.

OBJECTIVE: The purpose of this study was to compare the diagnostic efficacy conventional MRI and MR arthrography (MRA) in the diagnosis of chondromalacia patella (CP) on a low-field open magnet system (LFOMS), correlated with arthroscopy. SUBJECTS AND METHODS: Forty-two patients (50 knees) with pain in the anterior part of the knee were prospectively examined with LFOMS, including T1-weighted, proton density-weighted and T2-weighted sequences. All were also examined T1-weighted MRI after intraarticular injection of dilue gadopentetate dimeglumine. Two observers, who reached a consensus interpretation, evaluated each imaging technique independently. Thirty-six of the 50 facets examined had chondromalacia shown by arthroscopy, which was used as the standard of reference. The sensitivity, specificity and accuracy of each imaging technique in the diagnosis of each stage of CP were determined and compared by using the McNemar two-tailed analysis. RESULTS: Arthroscopy showed that 16 facets were normal. Four (30%) of 13 grade 1 lesions were detected with T1. Four lesions (30%) with T2 and three lesions (23%) with proton-weighted images were detected. Seven (53%) of 13 grade 1 lesions were detected with MRA. Grade 2 abnormalities were diagnosed in two (33%) of six facets with proton density-weighted pulse sequences, two (33%) of six facets with T1-weighted pulse sequences, in three (50%) of six facets with T2-weighted pulse sequences, in five (83%) of six facets with MRA sequences. Grade 3 abnormalities were diagnosed in three (71%) of seven facets with proton density- and T1-weighted images, five (71%) of seven facets with T2-weighted pulse sequences, six (85%) of seven facets with MRA sequences. Grade 4 CP was detected with equal sensitivity with T1-, proton density- and T2-weighted pulse sequences, all showing seven (87%) of the eight lesions. MRA again showed these findings in all eight patients. All imaging techniques were insensitive to grade 1 lesions and highly sensitive to grade 4 lesion, so that no significant difference among the techniques could be shown. CONCLUSION: All imaging technique studied had high specificity and accuracy in the detection and grading of CP; however, MRA was more sensitive than T1-weighted and proton density-weighted MR imaging on a LFOMS. Although the arthrographic techniques were not significantly better than T2-weighted imaging, the number of false-positive diagnosis was greatest with T2-weighted MRI.

Adult↗

PubMedDate not supplied

Virtual computed tomography cystoscopy in bladder pathologies.

OBJECTIVE: Assessed the usefulness of virtual cystoscopy performed with multidetector computed tomography (CT) in patients with different urinary bladder pathologies compared to the conventional cystoscopy. MATERIALS AND METHODS: Eighteen patients with different bladder pathologies, which consisted of 11 tumors, 3 diverticula, 2 trabecular changes and 2 stones, were assessed with conventional cystoscopy and virtual CT cystoscopy. The results of virtual CT cystoscopy were compared with the findings of conventional cystoscopy. We determined the detection rate and positive predictive value of CT imaging based virtual cystoscopy in the diagnosis of urinary bladder lesions. RESULTS: CT scanning was well tolerated by all patients, and no complications occurred. Images in 16 (88%) of the 18 virtual cystoscopic examinations were either of excellent or good quality. All tumors except one, 2 trabecular changes and 2 stones were characterized with similar findings in the both of methods. The masses ranged from 0.4 to 7.0 cm in diameter. While conventional cystoscopy could not evaluate interior part of the diverticulum, virtual CT cystoscopy could demonstrate clearly within it. There were no false-positive findings in our series. CONCLUSION: Virtual CT cystoscopy is a promising technique to be used in the detection of bladder lesions. It should be considered especially at the evaluation of bladder diverticula. In the future, it may be possible or even advantageous to incorporate into the imaging algorithm for evaluation of bladder lesion.

Adult↗