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Biomedical subjects

D Takhtani

Publications and source records attributed to D Takhtani.

15 recordsLinked to original sources

A bullet-sired bone cyst.

Random gunfire deposited a bullet in the proximal tibial metaphysis of a 9-year-old girl. The wound was not incapacitating and was treated conservatively. Within 17 months, soreness developed in the proximal leg, and radiography revealed a large unicameral cyst within which the bullet freely tumbled. Eventually, fear of impending fracture prompted further radiography, computed tomography, surgical intervention and pathological examination of the cyst wall. We believe this is only the second description in the English-language literature of this rare sequence of events.

Bone Cysts↗

MR imaging in cervical spine trauma.

This article emphasizes the technical aspects of MR imaging in acute cervical trauma, and details the specific protocols used at the authors' institution. A systematic approach to the evaluation of MR images in the trauma setting is discussed, and the role of MR imaging in the characterization of spinal cord injury and identification of spinal instability is defined. Correlations between MR imaging findings and patient functionality and outcome are outlined, and various classifications of cervical spine injuries are reviewed.

Cervical Vertebrae↗

Orbital mass lesions: US-guided fine-needle aspiration biopsy--experience in 37 patients.

PURPOSE: To evaluate the safety and effectiveness of using ultrasonographic (US) guidance for performing fine-needle aspiration biopsies of orbital mass lesions. MATERIALS AND METHODS: Thirty-seven patients with mass lesions in the orbit underwent US-guided fine-needle aspiration biopsy. Computed tomographic scans were available in all patients. In 19 patients, the lesions were located in posterior orbit, whereas in 18 patients the lesions were located in (n = 3) or extended up to (n = 15) the anterior compartment. Fine-needle aspiration biopsy was performed with 22-25-gauge needles and use of the freehand technique. RESULTS: Needle biopsies were performed safely and easily, and real-time US monitoring of the needle position was used to avoid injury to the eyeball. No major complications were encountered. Diagnostic specimens were obtained in 29 (78%) of the 37 patients, and 19 benign and 10 malignant disease processes were diagnosed. In eight patients (22%), an appropriate diagnosis could not be made, as aspiration samples yielded insufficient tissue. CONCLUSION: US provides safe and effective guidance for performing fine-needle aspiration biopsy in orbital mass lesions and is especially useful in deep-seated nonpalpable retrobulbar lesions.

Adolescent↗

Radiology of pancreatic tuberculosis: a report of three cases.

We report three cases of biopsy proven pancreatic tuberculosis. The patients presented with abdominal pain and intermittent fever. Ultrasound and computed tomography revealed a diffusely enlarged pancreas with focal hypoechoic/hypodense lesions in all three patients. In addition, one patient had a large pancreatic cyst with internal echoes. Associated findings included peripancreatic and mesenteric lymph nodes, bowel wall thickening of ileocecal junction, focal hepatic or splenic lesions, splenic vein thrombosis, and ascites. Pancreatic tuberculosis should be considered in the differential diagnosis of focal pancreatic lesions, especially if associated with ancillary findings such as enlarged hypodense nodes in the peripancreatic region or in the mesentery in patients presenting with longstanding fever and abdominal pain.

Adult↗

Sonographically guided fine-needle aspiration biopsy of lytic lesions of the spine: technique and indications.

PURPOSE: We report the use of sonography to guide fine-needle aspiration biopsies (FNABs) of lytic lesions of the spine. METHODS: Twenty-nine patients with lytic vertebral lesions with or without associated extraosseous soft-tissue extension underwent sonographically guided FNAB. Twelve cervical, 7 thoracic, 7 lumbar, and 3 sacral lesions were biopsied. Tissue samples were taken from either the bony lesion through a break in the cortex (n = 9) or the associated soft-tissue extension (n = 20). RESULTS: Adequate diagnostic material obtained in 27 cases (93%) revealed an inflammatory (n = 13) or malignant process (n = 14). Of the 2 patients with inconclusive FNAB findings, 1 patient was lost to follow-up, and the other underwent surgery, which revealed tuberculosis. No complications of FNAB were encountered. CONCLUSIONS: We conclude that sonography is a safe and effective guidance modality for FNAB of lytic lesions of the spine, especially for lesions in the cervical region. In the thoracic, lumbar, and sacral regions, however, the role of sonographically guided FNAB is limited to lesions affecting the posterior elements.

Adolescent↗

A heterotopic cerebellum presenting as a suprasellar mass with associated nasopharyngeal teratoma.

We present a case of nasopharyngeal teratoma that was discovered in association with a suprasellar heterotopic cerebellum in a newborn. Well-differentiated, heterotopic, cerebellar masses have been reported in the orbits, spine, and frontal encephalocele but not, to our knowledge, in the suprasellar region. In this report, we describe the imaging findings and discuss the possible origins of the two masses discovered in this case.

Adult↗