Cyst

Facial nerve palsy associated with a cystic lesion of the temporal bone

March 18, 2014     Na Hyun Kim, MD; Seung-Ho Shin, MD
article

Abstract

Facial nerve palsy results in the loss of facial expression and is most commonly caused by a benign, self-limiting inflammatory condition known as Bell palsy. However, there are other conditions that may cause facial paralysis, such as neoplastic conditions of the facial nerve, traumatic nerve injury, and temporal bone leions. We present a case of facial nerve palsy concurrent with a benign cystic lesion of the temporal bone, adjacent to the tympanic segment of the facial nerve. The patient's symptoms subsided after facial nerve decompression via a transmastoid approach.

Case report: Dermal inclusion cyst of the external auditory canal

December 20, 2013     Eric W. Cerrati, MD; Jonathan S. Kulbersh, MD; Paul R. Lambert, MD
article

Abstract

Dermal inclusion cysts are benign masses that arise as the result of the entrapment of ectodermal components during embryogenesis. Their presenting symptoms are a direct result of the mass effect of the growing cyst. We describe the case of a 23-month-old girl who presented with a single, large dermal inclusion cyst in the external auditory canal. Our review of the literature revealed that only 2 other cases of a dermal inclusion cyst in this location have been previously reported.

Extensive dentigerous cyst associated with a mesiodens: CT findings

August 21, 2013     Kyung Soo Kim, MD, PhD and Seog-Kyun Mun, MD, PhD
article

Abstract

The most common of the supernumerary teeth in humans are mesiodentes, which arise in the midline of the maxilla between the central incisors. The most common pathologic findings associated with a mesiodens are retention of the adjacent incisors, malposition, and diastema. The development of a dentigerous cyst in association with an impacted mesiodens is relatively uncommon. We report the case of a 35-year-old man with an extensive dentigerous cyst associated with a mesiodens who presented with a painful swelling in the left nasolabial area. We discuss the imaging findings in this case, particularly the contribution of computed tomography, and we review the literature on this interesting condition.

Ganglion cyst in the external auditory canal

August 21, 2013     Chi-Kyou Lee, MD; Mee-Hye Oh, MD; and Kye Hoon Park, MD
article

In rare instances, ganglion cysts of the TMJ can pre-sent as a mass of the EAC, sometimes without obvious communication with the glenoid fossa.

Wrong egg in the usual nest: Thyroid papillary carcinoma within a branchial cleft cyst

July 21, 2013     Mustafa Sagit, MD; Ayhan Gokler, MD; Istemihan Akin, MD; Unsal Han, MD
article

Abstract

Branchial cleft cysts are the most common lesions to arise laterally in the neck. Ectopic thyroid tissue within a branchial cleft cyst is rare, and a papillary carcinoma arising from this tissue is extremely rare. We present a case of a lateral neck cyst representing a primary papillary carcinoma that arose in ectopic thyroid tissue within a branchial cleft cyst in a 41-year-old woman. After the mass was surgically excised, thyroid ultrasonography, thyroid scintigraphy, and whole-body F18-fluorodeoxyglucose-positron emission tomography/computed tomography detected no abnormality. The negative findings notwithstanding, surgery on the thyroid gland was planned, but the patient refused it. Therefore, she was followed up with ultrasonography and scintigraphy for 5 years, during which time she exhibited no evidence of recurrence. Total thyroidectomy is still the primary option in such cases, but when it cannot be performed for any reason, vigilant follow-up is essential.

Aneurysmal bone cyst in the middle turbinate: A case report

June 11, 2013     Gokce Simsek, MD; Cem Saka, MD; Didem N. Sonbay, MD; Istemihan Akin, MD; and Fulya Koybasioglu, MD
article

Abstract

Aneurysmal bone cyst is a benign and locally destructive bone lesion usually seen in the younger population. Its etiology is unknown. Its yearly incidence rate has been reported to be 0.14/100,000, comprising 1% of all bone tumors. It may develop primarily or arise from primary bone tumors. Hemorrhagic fluid content with a septated appearance is the characteristic feature of aneurysmal bone cyst. It is most commonly seen in the metaphysis of the long bones. In rare cases, the cyst is located in the skull. Primary treatment is surgical excision, and the recurrence rate after treatment is 10 to 30%. Based on a review of the current literature, there have been no previous reports of aneurysmal bone cyst located in the middle turbinate. We report a case of aneurysmal bone cyst with an atypical location and discuss the treatment of the patient with endoscopic surgery in light of relevant literature.

Retention cyst in chronic otitis media

March 24, 2013     Min-Tsan Shu, MD; Kang-Chao Wu, MD; Yu-Chun Chen, MD
article

The retention cyst originates from the obstruction of a glandular structure and contains fluid, while the cholesteatoma contains keratinizing squamous epithelium.

Cervical thoracic duct cyst: Importance of preoperative suspicion for appropriate management of left-sided neck mass

December 31, 2012     Matthew T. Gill, MD; Timothy S. Lian, MD; Joel D. Thibodeaux, MD; Cherie-Ann O. Nathan, MD, FACS
article

Abstract

Cervical thoracic duct cysts occur infrequently but are an important consideration when evaluating cystic supraclavicular masses. Only 22 cases have been reported to date. We review the clinical presentation, evaluation, and treatment of 2 cases of large thoracic duct cysts treated with surgical resection. A high suspicion of thoracic duct cyst based on location, radiographic findings, and fine-needle aspiration results is sufficient evidence for recommendation of surgical excision. However, enlarged cysts, as noted in our cases, can obliterate or attenuate the thoracic duct, making it difficult to identify intraoperatively. A high suspicion of thoracic duct cyst is important for identifying and ligating the duct to prevent complications such as chyle leak or chylothorax.

Unusual presentation of Sjogren syndrome: Multiple parotid cysts

October 31, 2012     Ankur Gadodia, MD, DNB; Ashu Seith, MD; Raju Sharma, MD
article

Abstract

Sjögren syndrome is a chronic autoimmune exocrinopathy that destroys salivary and lacrimal gland tissue. We report an unusual case of this disease in a 40-year-old woman who presented with bilateral parotid cystic masses. As this case illustrates, Sjögren syndrome should be included in the differential diagnosis of bilateral cystic parotid lesions.

Hearing loss secondary to a nasopharyngeal retention cyst

October 31, 2012     Enrique Palacios, MD, FACR; Michael Ellis, MD; Harold Neitzschman, MD, FACR
article

Resection is generally not indicated for small, asymptomatic pharyngeal cysts. Symptomatic cysts, on the other hand, can be treated with aspiration or a complete transoral resection, particularly if the lesion is large.

Tongue base cyst in a 6-week-old boy

October 8, 2012     Joel Y. Sun, BA; Ron B. Mitchell, MD; Seckin O. Ulualp, MD
article

After excision, a histologic finding of an epithelial lining without ectopic thyroid tissue confirms the diagnosis of a lingual thyroglossal duct cyst.

Endoscopic view of bilateral maxillary sinus cysts removed with a powered instrument

September 7, 2012     Dewey A. Christmas, MD; Joseph P. Mirante, MD, FACS; Eiji Yanagisawa, MD, FACS
article

Powered instrumentation is a good choice for the removal of maxillary sinus lesions. It is efficient and safe and preserves normal sinus mucosa.

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