DOI: http://dx.doi.org/10.18203/2349-3291.ijcp20150998

Radiological findings of retroauricular dermoid with intra-calvarial extension

Kshitij Sharma, Keerthi Kocherla, Neelam Soni, Deepak Bhalekar, Ashish Kaushik, Mayank Ujjaliya

Abstract


Dermoid cysts are rare in head and neck region. A dermoid cyst arising in the retroauricular region over the mastoid can be easily misdiagnosed as a lymph node, thus posing significant diagnostic challenges. We present a case report of two year old boy with retroauricular dermoid showing intracalvarial extension. The child presented with the swelling in the right retro-auricular region with no associated hearing loss, tinnitus or vertigo. Provisional diagnosis clinically made was that of a large necrotic post auricular lymph node. On ultrasonography, well defined heterogeneous hypoechoic lesion showing few hyperechoic areas with scalloping and extension into the underlying temporal bone. On computed tomographic scan, heterogeneous non enhancing lesion showing areas of negative attenuation value seen in retroauricular region with extension into the temporal bone. Final diagnosis was confirmed by histopathological examination of the surgically resected specimen. 


Keywords


Retroauricular dermoid, Dermoid cyst, Intra-calvarial extension, Post auricular lymphadenopathy

Full Text:

PDF

References


Batsakis JG. Teratomas of the head and neck. In: Batsakis JG, eds. Tumours of the Head and Neck. 2nd ed. Baltimore, MD: Lippincott Williams and Wilkins; 1979: 226-232.

Osborn Anne G. Congenital dermoids. In: Anne G. Osborn, eds. Osborn’s Brain: Imaging, Pathology, and Anatomy. 1st ed. Salt Lake City, UT, USA: Amirsys, Inc; 2013: 783-785.

Toynbee J. Hairs in the mastoid cells. Transact Pathol Soc Lond. 1866;17:274.

Steel A. Secretory otitis media due to a hair-bearing dermoid of the mastoid cavity. J Laryngol Otol. 1976;90:979-89.

Fried MP, Vernick DM. Dermoid cyst of the middle ear and mastoid. Otolaryngol Head Neck Surg. 1984;92:594-6.

Howie TO. A case of dermoid or developmental cyst of the middle-ear cavity. J Laryngol Otol. 1962;76:62-6.

Minatogawa T, Node MN, Fukuda I, Kumoi T. Dermoid cyst in the middle ear. J Laryngol Otol. 1993;107:335-8.

Farris PE, Meyerhoff WL, Vuitch F. Congenital dermoid cyst of the middle ear. Skull Base Surg. 1998;8:77-80.

Scolozzi P, Lombardi T, Jaques B. Congenital intracranial frontotemporal dermoid cyst presenting as a cutaneous fistula. Head Neck. 2005;27:429-32.

Tsugu H, Fukushima T, Hayashi S, Iwaasa M, Matsuda T. Squamous cell carcinoma arising in an intracranial dermoid cyst. Neurologia Medico-Chirurgica. 2001;41(4):213-6.

Devine JC, Jones DC. Carcinomatous transformation of a sublingual dermoid cyst. Int J Oral Maxillofac Surg. 2000;29(2):126-7.