Bilateral parotid oncocytoma with spontaneous intratumoral hemorrhage: a rare hypervascular parotid tumor with ASL perfusion

Iida, Etsushi; Wiggins, Richard H.; Anzai, Yoshimi

doi:10.1016/j.clinimag.2016.02.003

Cited by 11 publications

(5 citation statements)

References 32 publications

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“…However, oncocytomas usually have higher ADC values than WTs[ 56 ]. Oncocytomas were reported to have ADC values ranging from (0.8-1.16) ×10 -3 mm 2 /s[ 56 , 63 ]. Hisatomi et al [ 61 ] found that oncocytomas have similar contrasting dynamics to WT, and consequently, they cannot be differentiated from WTs using DCE MRI alone.…”

Section: Salivary Gland Btsmentioning

confidence: 99%

Advanced magnetic resonance imaging findings in salivary gland tumors

Gökçe

Beyhan

2022

WJR

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Salivary gland tumors (SGTs) make up a small portion (approximately 5%) of all head and neck tumors. Most of them are located in the parotid glands, while they are less frequently located in the submandibular glands, minor salivary glands or sublingual gland. The incidence of malignant or benign tumors (BTs) in the salivary glands varies according to the salivary gland from which they originate. While most of those detected in the parotid gland tend to be benign, the incidence of malignancy increases in other glands. The use of magnetic resonance imaging (MRI) in the diagnosis of SGTs is increasing every day. While conventional sequences provide sufficient data on the presence, localization, extent and number of the tumor, they are insufficient for tumor specification. With the widespread use of advanced techniques such as diffusion-weighted imaging, semi-quantitative and quantitative perfusion MRI, studies and data have been published on the differentiation of malignant or BTs and the specificity of their subtypes. With diffusion MRI, differentiation can be made by utilizing the cellularity and microstructural properties of tumors. For example, SGTs such as high cellular Warthin’s tumor (WT) or lymphoma on diffusion MRI have been reported to have significantly lower apparent diffusion values than other tumors. Contrast agent uptake and wash-out levels of tumors can be detected with semi-quantitative perfusion MRI. For example, it is reported that almost all of the pleomorphic adenomas show an increasing enhancement time intensity curve and do not wash-out. On quantitative perfusion MRI studies using perfusion parameters such as Ktrans, Kep, and Ve, it is reported that WTs can show higher Kep and lower Ve values than other tumors. In this study, the contribution of advanced MRI to the diagnosis and differential diagnosis of SGTs will be reviewed.

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Section: Salivary Gland Btsmentioning

confidence: 99%

Advanced magnetic resonance imaging findings in salivary gland tumors

Gökçe

Beyhan

2022

WJR

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“…In the parotid gland, resection of these tumors has been found to be associated with hypervascularity with significant hemorrhage, however, this has yet to be reported in the orbit. 9 Due to the sensitive neuroanatomical landmarks of the orbit, significant intraoperative or postoperative bleeding could potentially be vision threatening. Thus, the authors suggest caution for early and aggressive efforts for hemostasis when approaching these tumors.…”

Section: Discussionmentioning

confidence: 99%

Primary Lacrimal Gland Oncocytoma Associated With Hypervascularity: A Case Report With Imaging and Immunohistochemical Characterization

Sweeney

Allen

2021

Ophthalmic Plastic &Amp; Reconstructive Surgery

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Oncocytoma is a rare benign neoplasm with few cases reported to involve the orbit. When affecting the orbit, oncocytomas have very slow growth and often evade early diagnosis. The diagnostic evaluation of these orbital tumors is not fully understood. The authors present a case of a benign oncocytoma arising in the lacrimal gland associated with significant vascularity and intraoperative bleeding. The authors provide immunohistochemical analysis of this rare orbital tumor and insights in surgical planning.

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“…For example, a histological examination of nerve bundles led to the speculation that ischemia of the nerve caused by external compression resulted in facial nerve palsy [ 3 ]. A case of spontaneous intratumoral hemorrhage in parotid oncocytoma was also reported [ 18 ]. Necrosis, inflammation, and fibrosis surrounding the branches of the facial nerve have also been considered to be a cause of palsy [ 1 ].…”

Section: Discussionmentioning

confidence: 99%

Oncocytoma of the Parotid Gland with Facial Nerve Paralysis

Hamada

Fujiwara

Hatakeyama

et al. 2018

Case Reports in Otolaryngology

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Parotid gland tumor with facial nerve paralysis is strongly suggestive of a malignant tumor. However, several case reports have documented benign tumors of the parotid gland with facial nerve paralysis. Here, we report a case of oncocytoma of the parotid gland with facial nerve paralysis. A 61-year-old male presented with pain in his right parotid gland. Physical examination demonstrated the presence of a right parotid gland tumor and ipsilateral facial nerve paralysis of House–Brackmann (HB) grade III. Due to the facial nerve paralysis, a malignant tumor of the parotid gland was suspected and right parotidectomy was performed. Oncocytoma was confirmed histopathologically. The facial nerve paralysis was resolved 2 months after surgery. During the follow-up period (one and a half years), no recurrence was observed. As the tumor showed a distinctive dumbbell shape and increased somewhat due to inflammation (i.e., infection), the facial nerve was pinched by the enlarged tumor. Ischemia and strangulation of the nerve were considered to be the cause of the facial nerve paralysis associated with the benign tumor in this case.

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Bilateral parotid oncocytoma with spontaneous intratumoral hemorrhage: a rare hypervascular parotid tumor with ASL perfusion

Cited by 11 publications

References 32 publications

Advanced magnetic resonance imaging findings in salivary gland tumors

Advanced magnetic resonance imaging findings in salivary gland tumors

Primary Lacrimal Gland Oncocytoma Associated With Hypervascularity: A Case Report With Imaging and Immunohistochemical Characterization

Oncocytoma of the Parotid Gland with Facial Nerve Paralysis

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