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Biomedical subjects

Showkat Mirza

Publications and source records attributed to Showkat Mirza.

4 recordsLinked to original sources
PubMed2006

Carcinoma arising in a pharyngeal pouch previously treated by endoscopic stapling.

OBJECTIVES: A case is described in which squamous cell carcinoma was found during surgery for a recurrent pharyngeal pouch previously treated by endoscopic stapling. A search of the English language literature suggests this is the first reported case of a carcinoma developing in a pharyngeal pouch previously treated by endoscopic stapling. STUDY DESIGN: Case report and literature review. MATERIALS AND METHODS: The records of a patient who presented with a recurrent pharyngeal pouch after a previous endoscopic stapling procedure were reviewed. The presentation, imaging, and histopathologic findings are presented and the implications of these discussed. RESULTS: Imaging confirmed a recurrent pharyngeal diverticulum. An endoscopic assessment revealed the presence of tumor in the recurrent pouch that histopathologic evaluation confirmed to be squamous cell carcinoma. The patient underwent an external excision of this diverticulum followed by a course of external beam radiotherapy. CONCLUSIONS: This is the first reported case of a carcinoma developing in a recurrent pharyngeal diverticulum previously treated by endoscopic stapling and brings to light a rare risk of endoscopic stapling procedures for the treatment of pharyngeal diverticula.

Aged↗
PubMed2002

Magnetic removal of a nasal foreign body.

We describe a case of metallic nasal foreign body removal from a child with the aid of a permanent magnet. This is the first documented case of such a technique as far as we are aware. Magnets may prove invaluable in the removal of metallic nasal foreign bodies particularly in children and avoid the need for a general anaesthetic. A brief review of the use of magnets to remove foreign bodies is included.

Foreign Bodies↗
PubMed2002

Radiologic differentiation of intracranial epidermoids from arachnoid cysts.

OBJECTIVE: Intracranial epidermoids (cholesteatomas) mimic arachnoid cysts in their radiologic characteristics, especially in the cerebellopontine angle. It is essential to differentiate the two conditions because they warrant different therapeutic interventions. The objective of this study is to elucidate the different radiologic characteristics of the conditions. STUDY DESIGN AND SETTING: This was a retrospective study of 4 patients referred for a differential diagnosis and management of intracranial cystic lesions to the Departments of Neurotology/Neurosurgery and Neuroradiology in a tertiary referral university hospital. PATIENTS: Four patients of different age groups with cystic intracranial lesions, diagnosed epidermoid or arachnoid cysts, were chosen. A retrospective analysis of their case charts, radiologic and surgical interventions, and follow-up records was undertaken. METHODS: The imaging techniques used included computerized tomographic scans, magnetic resonance imaging (MRI) with T1, T2, proton-density, and gadolinium-enhanced T1 images. In addition, special MRI sequences were used that included fluid-attenuated inversion recovery and echo planar diffusion scanning. All the patients underwent an audiovestibular evaluation. RESULTS: Both lesions are characteristically well demarcated and have a homogeneous low density, similar to cerebrospinal fluid on computerized tomographic scan, showing no contrast enhancement. On MRI, epidermoids and arachnoid cysts usually appear hypointense on T1-weighted images and hyperintense on T2-weighted images. On fluid-attenuated inversion recovery, an arachnoid cyst tends to follow cerebrospinal fluid intensity, whereas an epidermoid becomes hyperintense. There are occasions when an epidermoid may appear as a low-intensity lesion on fluid-attenuated inversion recovery. This dilemma is resolved with the use of echo planar diffusion scanning, on which an epidermoid remains bright. CONCLUSION: The authors recommend the use of fluid-attenuated inversion recovery and diffusion sequence MRI when definitive radiologic diagnosis of cystic intracranial lesions becomes difficult with routine computerized tomographic scanning and MRI.

Adult↗