1.Intracranial calcified schwannomas: report of two cases.
Jong Deok KIM ; Duck Hwan CHUNG
Journal of the Korean Radiological Society 1992;28(1):51-55
Calcification is exceedingly rare in schwannomas. In the literatures, we found only three reports of schwannomas with calcification. We report two cases of intracranial calcified schwannomas, one in the anterior cranial fossa and the other in the middle cranial fossa.
Cranial Fossa, Anterior
;
Cranial Fossa, Middle
;
Neurilemmoma*
2.A Case of Chondroma in Middle Cranial Fossa: Case Report.
Woo Yong PARK ; Sang Youl YOON ; Jin Hwa EUM ; Chang Gu KANG ; Dong Hee KIM ; Dae Jo KIM
Journal of Korean Neurosurgical Society 1988;17(5):1127-1134
Intracranial chondromas are extremely rare tumors, but when present, are generally related to the synchondrosis of the base, and they have several distinct features. They are slow growing benign tumors, and plain roentgenogram frequently reveals lytic lesion and stippled calcification at base of the skull. They are radioresistant, and surgical removal is treatment of choice. We report the rare case of chondroma arisen from base of the skull which diagnosed by brain CT and confirmed by operation.
Brain
;
Chondroma*
;
Cranial Fossa, Middle*
;
Skull
4.Intracranial Inflammatory Pseudotumors: MRI and CT Findings.
Eun Hee PARK ; Dae Hong KIM ; Ho Kyu LEE ; Chang Joob SONG ; Gi Hwa YANG ; Gun Sei OH ; Byung Chul AHN ; Jin Young CHUNG ; Mun Kab SONG
Journal of the Korean Radiological Society 1999;41(5):861-868
PURPOSE: The purpose of this study was to describe the MR imaging and CT findings of intracranial inflammatory pseudotumors. MATERIALS AND METHODS: We reviewed the MR imaging (n=8) and CT (n=4) studies of eight patients (M:F = 4:4, mean age: 41 years) with pathologically proven intracranial inflammatory pseudotumor. The findings were then evaluated with regard to location, shape, MR signal intensity, CT density and degree of contrast enhancement of the lesion, surrounding parenchymal edema, adjacent bone change and the location of accompanying extracranial lesion. RESULTS: In two patients, the parietal convexity was involved unilaterally, with no extracranial mass, and in the other six, the middle cranial fossa was involved unilaterally and extracranial mass was present. The lesion also involved the tentorium in four cases, the cavernous sinus in four, the anterior cranial fossa in one, and the posterior cranial fossa in one. The location of extracranial mass was the mastoid and middle ear cavity in two cases, the infratemporal fossa in two, both the infratemporal fossa and paranasal sinuses in one, and the orbit in one. MR images showed diffuse dural thickening in all eight cases, leptomeningeal thickening in four, and focal meningeal-based mass in two. As seen on T1-weighted images, the lesions were isointense to gray matter in eight cases, and on T2-weighted images were hypointense in seven cases and isointense in one. Marked homogeneous contrast enhancement was seen in all eight cases. The lesions seen on brain CT, performed in two cases, were isodense. Adjacent brain parenchymal edema and the destruction of adjacent bones were each seen in five cases. CONCLUSION: The characteristic MR findings of intracranial inflammatory pseudotumors are(1) diffuse dural thickening;(2) a focal meningeal-based mass which on T2-weighted images is seen as hypointense; and marked (3) contrast enhancement : these findings are, however, nonspecific. In order to differentiate these tumors, an awareness of these findings is, however, useful.
Brain
;
Cavernous Sinus
;
Cranial Fossa, Anterior
;
Cranial Fossa, Middle
;
Cranial Fossa, Posterior
;
Ear, Middle
;
Edema
;
Granuloma, Plasma Cell*
;
Humans
;
Magnetic Resonance Imaging*
;
Mastoid
;
Orbit
;
Paranasal Sinuses
;
Rabeprazole
5.Giant-Cell Tumor of the Middle Cranial Fossa.
Young Su KIM ; Byung Chan JEON
Journal of Korean Neurosurgical Society 2003;34(5):484-486
The authors report a case of giant-cell tumor of the right middle cranial fossa floor a 43-year-old man. His presentation, characteristic magnetic resonance image findings, treatment, and 2-year follow-up result are described. The patient about this rare neoplasm of the skull base are also reviewed.
Adult
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Cranial Fossa, Middle*
;
Follow-Up Studies
;
Humans
;
Skull Base
6.A Giant Craniopharyngioma Evaluated by Computed Tomographic Scan.
Hee Won JUNG ; Byung Duk KWUN ; Kil Soo CHOI ; Je G CHI
Journal of Korean Neurosurgical Society 1979;8(2):317-322
The ability of CT scan to differentiate and accurately localize cystic, solid, and calcified portions of craniopharyngioma with the ventricular size as well now makes it a very valuable method of investigating this congenital tumor. The authors report a case of huge, mainly cystic craniopharyngioma which unusually occupied entire middle cranial fossa, presenting as an isodense area with suprasellar calcification in brain CT scan.
Brain
;
Cranial Fossa, Middle
;
Craniopharyngioma*
;
Tomography, X-Ray Computed
7.Suboccipital Suprameatal Approach for Petrosal Meningiomas Extended into Meckel's Cave.
Young SONG ; Seung Myung MOON ; Jong Joo RHEE ; Chang Jin KIM ; Jeong Hoon KIM ; Jung Kyo LEE
Journal of Korean Neurosurgical Society 2003;33(2):132-136
OBJECTIVE: The petrosal meningiomas involving the middle cranial fossa through the Meckel's cave represent a difficult surgical challenge. We report our experience of removing these lesions through the suboccipital approach combined with a technique that expose the Meckel's cave by removing the bony prominence located above the porus of the internal acoustic meatus, called the suprameatal tubercle, and the surrounding bone. METHODS: Between the period of January 1999 and October 2001, a total of seven patients with petrosal meningiomas involving the Meckel's cave were operated upon using suboccipital suprameatal approach. In the supine position, suboccipital craniotomy was performed. The main mass located predominantly within the cerebellopontine angle(CPA) was removed using intradural approach. The suprameatal tubercle was drilled-out to expose the Meckel's cave. And then, the tumor extended into the middle cranial fossa through the Meckel's cave was removed. RESULTS: In every case, the tumor extending into the Meckel's cave was exposed well. The tumors were completely removed in all patients without serious complications. CONCLUSION: We believe that suboccipital suprameatal approach offers a safe and effective method to remove some selected lesions of the CPA area extended into the middle cranial fossa through the Meckel's cave without the need for complex procedures, if the main mass is located predominantly in the CPA area.
Acoustics
;
Cranial Fossa, Middle
;
Craniotomy
;
Humans
;
Meningioma*
;
Supine Position
8.Infratemporal Fossa Approach to Lesions in the Base of the Skull.
Sang Pyung LEE ; Jang Gu KWEON ; Sung Kyoo HWANG ; In Suk HAMM ; Yeun Mook PARK ; Seung Lae KIM ; Sang Heun LEE ; Jun Sik PARK ; Tae Hwan CHO
Journal of Korean Neurosurgical Society 1991;20(6):447-455
The technique and results of infratemporal fossa approach of jugular formamen meuroma and clivus chordoma are presented. The infratemporal fossa approach allowed radical removal of jugualr foramen neuroma and effective palliative removal of clivus chordoma. The basic features of infratemporal fossa approach are permanent anterior displacement of the facial nerve, subtotal petrosectomy and obliteration of the middle ear cleft.
Chordoma
;
Cranial Fossa, Posterior
;
Ear, Middle
;
Facial Nerve
;
Neuroma
;
Skull*
9.A Case of Facial Nerve Schwannoma Extending into the Middle Cranial Fossa.
Ki Hong CHANG ; Jong Soo KIM ; Yong Oh KIM ; Sang Won YEO
Korean Journal of Otolaryngology - Head and Neck Surgery 1998;41(11):1481-1484
Schwannomas of the facial nerve are uncommon tumors, accounting for about 0.8% of all intrapetrous mass lesion.1-3) Very rarely do these lesions acts as expansile tumors of the petrous bone that extend to involve the intracranial cavity.1-10) Recently we experienced 1 case of facial nerve schwannoma unusually extending into middle cranial fossa which was removed by transcochlear and middle fossa approach. So we report the case with review of literature.
Cranial Fossa, Middle*
;
Facial Nerve*
;
Neurilemmoma*
;
Petrous Bone
10.Surgical Anatomical Landmarks for Petrous Apex.
Won Sang LEE ; Jie Soo KIM ; Ho Ki LEE ; Sung Kyun MOON ; In Hyuk CHUNG
Korean Journal of Otolaryngology - Head and Neck Surgery 1999;42(4):405-410
BACKGROUND AND OBJECTIVES: Anatomical knowledge of the petrous apex is essential to otolaryngologist to explore the skull base lesions. This study was designed to investigate the surgical anatomy of the petrous apex and the middle cranial fossa. MATERIALS AND METHODS: We dissected 32 temporal bones in order to establish the anatomical relationships of petrous apex structures. We measured distances and angles between different structures so that surgeons can rely on to work in this area. RESULTS: The results of the present study showed distances and angles of the different petrous apex structures. The angle between posterior point-foramen spinosum and porus was 90 degree. CONCLUSION: We could suggest the new indicators to identify the internal acoustic canal.
Acoustics
;
Cranial Fossa, Middle
;
Skull Base
;
Temporal Bone