Top

Japanese Journal of Radiology

Published in:

01-11-2013 | Original Article

Imaging findings of parapharyngeal space pleomorphic adenoma in comparison with parotid gland pleomorphic adenoma

Authors: Hiroki Kato, Masayuki Kanematsu, Keisuke Mizuta, Mitsuhiro Aoki

Published in: Japanese Journal of Radiology | Issue 11/2013

Abstract

Purpose

The purpose of this study was to assess imaging findings of parapharyngeal space (PPS) pleomorphic adenoma (PA) in comparison with parotid gland (PG) PA retrospectively.

Materials and methods

Ten patients with PPS PAs and 66 with PG PAs were included. CT and MR images were reviewed for the size, presence of calcification or cystic degeneration, and MR signal intensity of solid components.

Results

The maximum diameter was greater in PPS PA (57.3 ± 11.4 mm) than in PG PA (28.7 ± 20.8 mm) (p < 0.01). The frequency of calcification was higher in PPS PA (50 %) than in PG PA (15 %) (p < 0.05). The frequency of cystic degeneration was marginally higher in PPS PA (60 %) than in PG PA (29 %) (p = 0.058). On T2-weighted images, solid components of PPS and PG PAs showed hyperintensity in 40 and 54 %, isointensity in 50 and 32 %, and hypointensity in 10 and 14 %, respectively.

Conclusion

The size and the frequency of calcification or cystic degeneration were higher in PPS PAs than in PG PAs. Radiologists should recognize the difference in imaging features between PPS and PG PAs.

Eveson JW, Cawson RA. Salivary gland tumours. A review of 2410 cases with particular reference to histological types, site, age and sex distribution. J Pathol. 1985;146:51–8.PubMedCrossRef

Waldron CA, el-Mofty SK, Gnepp DR. Tumors of the intraoral minor salivary glands: a demographic and histologic study of 426 cases. Oral Surg Oral Med Oral Pathol. 1988;66:323–33.PubMedCrossRef

Moonis G, Patel P, Koshkareva Y, Newman J, Loevner LA. Imaging characteristics of recurrent pleomorphic adenoma of the parotid gland. AJNR Am J Neuroradiol. 2007;28:1532–6.PubMedCrossRef

Shi H, Wang P, Wang S, Yu Q. Pleomorphic adenoma with extensive ossified and calcified degeneration: unusual CT findings in one case. AJNR Am J Neuroradiol. 2008;29:737–8.PubMedCrossRef

Miliauskas JR, Hunt JL. Primary unilateral multifocal pleomorphic adenoma of the parotid gland: molecular assessment and literature review. Head Neck Pathol. 2008;2:339–42.PubMedCrossRef

Zhi K, Ren W, Zhou H, Wen Y, Zhang Y. Management of parapharyngeal-space tumors. J Oral Maxillofac Surg. 2009;67:1239–44.PubMedCrossRef

Mendelsohn AH, Bhuta S, Calcaterra TC, Shih HB, Abemayor E, St John MA. Parapharyngeal space pleomorphic adenoma: a 30-year review. Laryngoscope. 2009;119:2170–4.PubMedCrossRef

Som PM, Sacher M, Stollman AL, Biller HF, Lawson W. Common tumors of the parapharyngeal space: refined imaging diagnosis. Radiology. 1988;169:81–5.PubMed

Ikeda K, Katoh T, Ha-Kawa SK, Iwai H, Yamashita T, Tanaka Y. The usefulness of MR in establishing the diagnosis of parotid pleomorphic adenoma. AJNR Am J Neuroradiol. 1996;17:555–9.PubMed

10.

Lev MH, Khanduja K, Morris PP, Curtin HD. Parotid pleomorphic adenomas: delayed CT enhancement. AJNR Am J Neuroradiol. 1998;19:1835–9.PubMed

11.

Motoori K, Yamamoto S, Ueda T, Nakano K, Muto T, Nagai Y, et al. Inter- and intratumoral variability in magnetic resonance imaging of pleomorphic adenoma: an attempt to interpret the variable magnetic resonance findings. J Comput Assist Tomogr. 2004;28:233–46.PubMedCrossRef

12.

Sergi B, Limongelli A, Scarano E, Fetoni AR, Paludetti G. Giant deep lobe parotid gland pleomorphic adenoma involving the parapharyngeal space. Report of three cases and review of the diagnostic and therapeutic approaches. Acta Otorhinolaryngol Ital. 2008;28:261–5.PubMed

13.

Lee YY, Wong KT, King AD, Ahuja AT. Imaging of salivary gland tumours. Eur J Radiol. 2008;66:419–36.PubMedCrossRef

14.

Okahara M, Kiyosue H, Hori Y, Matsumoto A, Mori H, Yokoyama S. Parotid tumors: MR imaging with pathological correlation. Eur Radiol. 2003;13(Suppl 4):L25–33.PubMedCrossRef

15.

Habermann CR, Arndt C, Graessner J, Diestel L, Petersen KU, Reitmeier F, et al. Diffusion-weighted echo-planar MR imaging of primary parotid gland tumors: is a prediction of different histologic subtypes possible? AJNR Am J Neuroradiol. 2009;30:591–6.PubMedCrossRef

16.

Kato H, Kanematsu M, Ando K, Mizuta K, Ito Y, Hirose Y, et al. Ossifying pleomorphic adenoma of the parotid gland: a case report and review. Australas Radiol. 2007;51(Suppl):B173–5.PubMedCrossRef

17.

Takeshita T, Tanaka H, Harasawa A, Kaminaga T, Imamura T, Furui S. Benign pleomorphic adenoma with extensive cystic degeneration: unusual MR findings in two cases. Radiat Med. 2004;22:357–61.PubMed

18.

Layfield LJ, Reznicek M, Lowe M, Bottles K. Spontaneous infarction of a parotid gland pleomorphic adenoma. Report of a case with cytologic and radiographic overlap with a primary salivary gland malignancy. Acta Cytol. 1992;36:381–6.PubMed

19.

Abiko Y, Kaku T, Shimono M, Noma H, Shigematsu T. Large cyst formation in pleomorphic adenoma. Bull Tokyo Dent Coll. 1993;34:9–14.PubMed

20.

Shin JH, Lee HK, Kim SY, Choi CG, Suh DC. Imaging of parapharyngeal space lesions: focus on the prestyloid compartment. AJR Am J Roentgenol. 2001;177:1465–70.PubMedCrossRef

Title: Imaging findings of parapharyngeal space pleomorphic adenoma in comparison with parotid gland pleomorphic adenoma
Authors: Hiroki Kato
Masayuki Kanematsu
Keisuke Mizuta
Mitsuhiro Aoki
Publication date: 01-11-2013
Publisher: Springer Japan
Published in: Japanese Journal of Radiology / Issue 11/2013
Print ISSN: 1867-1071
Electronic ISSN: 1867-108X
DOI: https://doi.org/10.1007/s11604-013-0242-4

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Imaging findings of parapharyngeal space pleomorphic adenoma in comparison with parotid gland pleomorphic adenoma

Abstract

Purpose

Materials and methods

Results

Conclusion

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Purpose

Materials and methods

Results

Conclusion

Please log in to get access to this content

Other articles of this Issue 11/2013

Adenoid cystic carcinoma of the maxillary sinus: CT and MR imaging findings

The use of sonoelastographic elasticity index to differentiate benign and malignant thyroid nodules

External beam radiotherapy for angiographically diagnosed arteriovenous malformation involving the entire pancreas

Useful techniques for ultrasonography-guided free-hand puncture of a deep peripheral vein and catheter placement to obtain CT angiography

MR signal changes on hepatobiliary imaging after oral ingestion of manganese chloride tetrahydrate: preliminary examination

Effect of diagnostic predictions combined with clinical information on avoiding perceptual errors of computed tomography