Unilocular Cystic Sebaceous Lymphadenoma of the Parotid Gland

Unilocular cystic sebaceous lymphadenoma: a rare tumour

“…5 Lesions occurring as solitary cysts are uncommon. 4 Most of these features were noticed in our case with the exception of being an unencapsulated, unicystic mass.…”

“…4 A single case has been reported in the anterior midline of the neck. Most patients are 50 years or older at the time of diagnosis.…”

“…One theory proposes that sebaceous lymphadenoma appears to arise from ectopic salivary gland tissue entrapped in lymph nodes during embryogenesis. 4 This observation is based on the fact that the ectopic salivary gland tissue in intraparotid or periparotid lymph nodes is a common finding. Additionally, the presence of sebaceous differentiation in some of the intranodal salivary gland inclusions and demonstration of a fibrous capsule with sinuses, lymphoid follicles and germinal centres in most of the tumours, support the presence of an underlying lymph node component.…”

Sebaceous Lymphadenoma Identified by Fine Needle Aspiration Biopsy

“…These sebaceous cells stain positively for fat (e.g., oil red O stain) but negatively for mucin, thus differentiating them from mucoepidermoid tumor. 7 This case demonstrates the difficulty in diagnosing sebaceous lymphadenoma by FNAB. The FNAB obtained in this case showed features consistent with Warthin's tumor (papillary cystadenoma lymphomatosum) and was, in fact, signed out at the time of FNAB as Warthin's tumor.…”

Parotid sebaceous lymphadenoma associated with Sjogren’s syndrome: Review of pathologic and radiologic characteristics and clinical presentation

“…These tumors typically present as a unilateral, painless facial swelling. [1,2] Tumors are treated by parotidectomy, local excision, or enucleation. Recurrence is rare.…”