Khadaroo R G, Walton J M, Ramsay J A, Hicks M J, Archibald S D
Division of Pediatric Surgery, Children's Hospital at Hamilton Health Science Corporation, McMaster University Medical Centre Campus, Ontario, Canada.
J Pediatr Surg. 1998 Jun;33(6):893-5. doi: 10.1016/s0022-3468(98)90668-6.
Although mucoepidermoid carcinoma (MEC) is the most common malignant salivary gland neoplasm in childhood and adolescence, it is rarely found in children under the age of 10. A 6-year-old girl had an asymptomatic neck mass for 5 months. Clinical examination findings showed a 1.5-cm smooth and firm but mobile nontender mass located in the upper left anterior cervical triangle, clinically separate from the parotid gland. Ultrasound examination findings showed a vascular mass, with a cystic component, possibly within the tail of the parotid gland. An excisional biopsy was performed and frozen section showed a low-grade MEC. A left superficial parotidectomy was then performed. Final histopathologic examination showed one positive resection margin. Subsequently, reexcision of the surgical site and an upper modified neck dissection was undertaken. This unusual presentation of MEC as a neck mass in one of the youngest reported patients illustrates that the anatomic region for parotid tumors is large. Possibly some of these tumors may arise from heterotopic or accessory parotid tissue.
尽管黏液表皮样癌（MEC）是儿童和青少年中最常见的恶性涎腺肿瘤，但在10岁以下儿童中很少见。一名6岁女孩有一个无症状颈部肿块5个月。临床检查发现一个1.5厘米大小、光滑、质地硬但可活动的无压痛肿块，位于左上前颈三角区，临床上与腮腺分开。超声检查发现一个有血管的肿块，有囊性成分，可能位于腮腺尾部。进行了切除活检，冰冻切片显示为低级别MEC。随后进行了左侧腮腺浅叶切除术。最终组织病理学检查显示一个手术切缘阳性。随后，对手术部位进行了再次切除，并进行了改良颈部上区清扫术。MEC在一名报告的最年幼患者中表现为颈部肿块，这种不寻常的表现说明腮腺肿瘤的解剖区域很大。这些肿瘤中可能有些起源于异位或副腮腺组织。
