mayank goyal | HNB Garhwal University (original) (raw)
Papers by mayank goyal
Australasian Radiology, 1997
Acute viral encephalitides have a high mortality and morbidity in all age groups. Early instituti... more Acute viral encephalitides have a high mortality and morbidity in all age groups. Early institution of appropriate medical treatment can alter the prognosis dramatically. Imaging studies may be normal or may show a wide variety of subtle findings in the initial stages. Knowledge of the extremely varied clinical as well as radiological expression of the disease is essential to enable timely diagnosis. A case is presented here of histopathologically proven Herpes simplex encephalitis (HSE), wherein a large intracerebral haematoma was seen on imaging studies. Observation of the accompanying subtle findings and knowledge of the variability of expression of this disease helped in reaching the correct diagnosis.
Many therapeutic techniques have been used for the treatment of symptomatic vertebral hemangiomas... more Many therapeutic techniques have been used for the treatment of symptomatic vertebral hemangiomas (SVH), and each has its own limitations. Our objective was to evaluate the therapeutic efficacy of alcohol ablation for treating these lesions. Fourteen patients with SVH were treated by injection of absolute alcohol into the lesion via the percutaneous transpedicular route under CT guidance. Symptoms before treatment included neurologic deficit in 13 patients and debilitating pain in one. All patients underwent preprocedural MR imaging. All patients had clinical and MR imaging follow-up (14 patients at 48-96 hours and 2 months; six at 9-15 months). Results were divided into excellent (resumption of work, alleviation of pain), good (significant improvement), and failure of treatment categories on the basis of subjective assessment of clinical improvement. Clinical improvement/deterioration was correlated with MR-revealed changes. All patients showed transient deterioration of neurologic status after alcohol ablation. Subsequently, excellent results were seen in five patients and eight were in the good category. One patient in whom treatment failed also developed a complication (paravertebral abscess). Four of the eight patients with good results had preprocedural cord changes. Total follow-up ranged from 5 to 31 months, with 11 patients showing stable improvement. One patient developed recurrent hemangioma within a month. Another patient became symptomatic after initial good response, secondary to the collapse of the involved vertebral body. Good correlation was found between clinical improvement and reduction of epidural soft-tissue masses on MR images. Cord signal alteration seen on MR images in four treated patients, however, did not show any change after treatment. Alcohol ablation is an effective management option for symptomatic vertebral hemangiomas. Although encouraging results were seen in almost 86% of our patients, a longer follow-up period still is needed to assess the stability of improvement. Potential complications include vertebral collapse and infection.
Seminars in Roentgenology, 1997
Australasian Radiology, 1997
A case is presented here of Castleman disease in an uncommon location. Ultrasonography demonstrat... more A case is presented here of Castleman disease in an uncommon location. Ultrasonography demonstrated a large hypoechoic mass with multiple vascular channels. On computed tomography, the lesions with a nodular contour were located lateral to the carotid sheath on the right side, and demonstrated a variegated enhancement pattern.
Surgery Today, 1997
Primary retroperitoneal (RP) teratoma is a rare entity which has a distinctive imaging appearance... more Primary retroperitoneal (RP) teratoma is a rare entity which has a distinctive imaging appearance. We describe herein the case of a 25-year-old man in whom a RP teratoma was found to have an extremely unusual imaging morphology by ultrasound and computed tomography (CT). The tumor was resected and histopathological examination confirmed the diagnosis of primary benign RP teratoma.
Pediatric Radiology, 1996
Diffuse pneumocephalus due to infection by gas forming organisms is very unusual. We report compu... more Diffuse pneumocephalus due to infection by gas forming organisms is very unusual. We report computed tomography (CT) findings of such a case in an infant withClostridium meningitis.
Australasian Radiology, 1998
Distant metastases from carcinoma of the palatine tonsil are very uncommon. We encountered a case... more Distant metastases from carcinoma of the palatine tonsil are very uncommon. We encountered a case of a carcinoma involving the tonsillar region that resulted in subarachnoid mestastases following local radical radiotherapy. Metastases were diagnosed following magnetic resonance imaging and spinal fluid cytology. The patient succumbed to the disease after a rapid downhill course, 1 month following diagnosis of the secondary deposit. The present paper describes the rare site of distant metastasis and reviews the relevant literature.
Neuroradiology, 2000
Aspergillosis of the cavernous sinus is rare, especially in immuno competent individuals. We repo... more Aspergillosis of the cavernous sinus is rare, especially in immuno competent individuals. We report three such cases secondary to paranasal sinus aspergillosis, with imaging findings.
Journal of Clinical Ultrasound, 1996
Neuroradiology, 1997
Hypertrophic pachymeningitis is extremely rare. It is a fibrosing inflammatory process which invo... more Hypertrophic pachymeningitis is extremely rare. It is a fibrosing inflammatory process which involves the dura mater, including the tentorium. Numerous pathological entities produce thickening of the pachymeninges, so that idopathic hypertrophic pachymeningitis is a diagnosis of exclusion. We describe four patients with idiopathic hypertrophic pachymeningitis who had varied clinical presentation. Imaging studies revealed diffuse thickening of the pachymeninges; in one patient there was extensive dural sinus thrombosis. Since no identifiable cause was found, the cases were labelled as idiopathic.
Neuroradiology, 1997
We report confirmation of the site of leakage in two patients with spontaneous cerebrospinal flui... more We report confirmation of the site of leakage in two patients with spontaneous cerebrospinal fluid (CSF) rhinorrhoea by demonstrating CSF leaking on MRI. Both patients had midline anterior cranial fossa floor (cribriform plate/fovea ethmoidalis) dural-bone defects with arachnoid herniation with or without brain herniation into the upper part of the nasal cavity on MRI, which was subsequently confirmed surgically. Corresponding to the history of postural induction or aggravation of the rhinorrhoea, the CSF leak was demonstrated by the appearance of or increase in the sinonasal fluid collection by imaging the patient in the position of maximum leakage following initial images in the supine position.
Neuroradiology, 1996
Intramedullary (subpial) lipomas not associated with spinal dysraphism are very unusual [1]. A co... more Intramedullary (subpial) lipomas not associated with spinal dysraphism are very unusual [1]. A confident preoperative diagnosis is usually possible with MRI. We present a case of an isolated cervical intramedullary lipoma with unusual imaging morphology and imaging characteristics (distinctly low-signal on T2-weighted images) on MRI. An explanation for these features is proposed.
Australasian Radiology, 1997
Acute viral encephalitides have a high mortality and morbidity in all age groups. Early instituti... more Acute viral encephalitides have a high mortality and morbidity in all age groups. Early institution of appropriate medical treatment can alter the prognosis dramatically. Imaging studies may be normal or may show a wide variety of subtle findings in the initial stages. Knowledge of the extremely varied clinical as well as radiological expression of the disease is essential to enable timely diagnosis. A case is presented here of histopathologically proven Herpes simplex encephalitis (HSE), wherein a large intracerebral haematoma was seen on imaging studies. Observation of the accompanying subtle findings and knowledge of the variability of expression of this disease helped in reaching the correct diagnosis.
Many therapeutic techniques have been used for the treatment of symptomatic vertebral hemangiomas... more Many therapeutic techniques have been used for the treatment of symptomatic vertebral hemangiomas (SVH), and each has its own limitations. Our objective was to evaluate the therapeutic efficacy of alcohol ablation for treating these lesions. Fourteen patients with SVH were treated by injection of absolute alcohol into the lesion via the percutaneous transpedicular route under CT guidance. Symptoms before treatment included neurologic deficit in 13 patients and debilitating pain in one. All patients underwent preprocedural MR imaging. All patients had clinical and MR imaging follow-up (14 patients at 48-96 hours and 2 months; six at 9-15 months). Results were divided into excellent (resumption of work, alleviation of pain), good (significant improvement), and failure of treatment categories on the basis of subjective assessment of clinical improvement. Clinical improvement/deterioration was correlated with MR-revealed changes. All patients showed transient deterioration of neurologic status after alcohol ablation. Subsequently, excellent results were seen in five patients and eight were in the good category. One patient in whom treatment failed also developed a complication (paravertebral abscess). Four of the eight patients with good results had preprocedural cord changes. Total follow-up ranged from 5 to 31 months, with 11 patients showing stable improvement. One patient developed recurrent hemangioma within a month. Another patient became symptomatic after initial good response, secondary to the collapse of the involved vertebral body. Good correlation was found between clinical improvement and reduction of epidural soft-tissue masses on MR images. Cord signal alteration seen on MR images in four treated patients, however, did not show any change after treatment. Alcohol ablation is an effective management option for symptomatic vertebral hemangiomas. Although encouraging results were seen in almost 86% of our patients, a longer follow-up period still is needed to assess the stability of improvement. Potential complications include vertebral collapse and infection.
Seminars in Roentgenology, 1997
Australasian Radiology, 1997
A case is presented here of Castleman disease in an uncommon location. Ultrasonography demonstrat... more A case is presented here of Castleman disease in an uncommon location. Ultrasonography demonstrated a large hypoechoic mass with multiple vascular channels. On computed tomography, the lesions with a nodular contour were located lateral to the carotid sheath on the right side, and demonstrated a variegated enhancement pattern.
Surgery Today, 1997
Primary retroperitoneal (RP) teratoma is a rare entity which has a distinctive imaging appearance... more Primary retroperitoneal (RP) teratoma is a rare entity which has a distinctive imaging appearance. We describe herein the case of a 25-year-old man in whom a RP teratoma was found to have an extremely unusual imaging morphology by ultrasound and computed tomography (CT). The tumor was resected and histopathological examination confirmed the diagnosis of primary benign RP teratoma.
Pediatric Radiology, 1996
Diffuse pneumocephalus due to infection by gas forming organisms is very unusual. We report compu... more Diffuse pneumocephalus due to infection by gas forming organisms is very unusual. We report computed tomography (CT) findings of such a case in an infant withClostridium meningitis.
Australasian Radiology, 1998
Distant metastases from carcinoma of the palatine tonsil are very uncommon. We encountered a case... more Distant metastases from carcinoma of the palatine tonsil are very uncommon. We encountered a case of a carcinoma involving the tonsillar region that resulted in subarachnoid mestastases following local radical radiotherapy. Metastases were diagnosed following magnetic resonance imaging and spinal fluid cytology. The patient succumbed to the disease after a rapid downhill course, 1 month following diagnosis of the secondary deposit. The present paper describes the rare site of distant metastasis and reviews the relevant literature.
Neuroradiology, 2000
Aspergillosis of the cavernous sinus is rare, especially in immuno competent individuals. We repo... more Aspergillosis of the cavernous sinus is rare, especially in immuno competent individuals. We report three such cases secondary to paranasal sinus aspergillosis, with imaging findings.
Journal of Clinical Ultrasound, 1996
Neuroradiology, 1997
Hypertrophic pachymeningitis is extremely rare. It is a fibrosing inflammatory process which invo... more Hypertrophic pachymeningitis is extremely rare. It is a fibrosing inflammatory process which involves the dura mater, including the tentorium. Numerous pathological entities produce thickening of the pachymeninges, so that idopathic hypertrophic pachymeningitis is a diagnosis of exclusion. We describe four patients with idiopathic hypertrophic pachymeningitis who had varied clinical presentation. Imaging studies revealed diffuse thickening of the pachymeninges; in one patient there was extensive dural sinus thrombosis. Since no identifiable cause was found, the cases were labelled as idiopathic.
Neuroradiology, 1997
We report confirmation of the site of leakage in two patients with spontaneous cerebrospinal flui... more We report confirmation of the site of leakage in two patients with spontaneous cerebrospinal fluid (CSF) rhinorrhoea by demonstrating CSF leaking on MRI. Both patients had midline anterior cranial fossa floor (cribriform plate/fovea ethmoidalis) dural-bone defects with arachnoid herniation with or without brain herniation into the upper part of the nasal cavity on MRI, which was subsequently confirmed surgically. Corresponding to the history of postural induction or aggravation of the rhinorrhoea, the CSF leak was demonstrated by the appearance of or increase in the sinonasal fluid collection by imaging the patient in the position of maximum leakage following initial images in the supine position.
Neuroradiology, 1996
Intramedullary (subpial) lipomas not associated with spinal dysraphism are very unusual [1]. A co... more Intramedullary (subpial) lipomas not associated with spinal dysraphism are very unusual [1]. A confident preoperative diagnosis is usually possible with MRI. We present a case of an isolated cervical intramedullary lipoma with unusual imaging morphology and imaging characteristics (distinctly low-signal on T2-weighted images) on MRI. An explanation for these features is proposed.