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An extremely rare case of metastatic retinoblastoma of parotids presenting as a massive swelling in a child

机译:腮腺转移性视网膜母细胞瘤的极少数病例表现为儿童大量肿胀

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摘要

Retinoblastoma (Rb) is a common childhood malignancy but bilateral Rb with metastasis to parotids is very uncommon. To the best of our knowledge, bilateral Rb metastasizing to parotids is very rare and this is the fifth such case reported in world literature till date in a 2-year-old male child who underwent exenteration of left eye for bilateral Rb and later developed recurrent metastasis to left parotid requiring parotidectomy. A year later he presented again with swelling left parotid region extending from occipital region reaching upto left anterior chest wall with intra-cranial extension on magnetic resonance imaging. Histopathological examination of the parotid swelling and immunohistochemistry showed metastasis from Rb. He was treated with chemotherapy followed by radiotherapy to local site and brain to which he responded well. Presently on regular follow up without any signs of locoregional and distal metastasis. Till date different types of primary parotid tumors have been reported in literature but a metastatic parotid tumor is extremely rare and therefore this case is being reported to highlight the extreme rarity, the diagnostic and therapeutic challenges, the highly aggressive nature and overall dismal prognosis of this disease entity.
机译:视网膜母细胞瘤(Rb)是儿童常见的恶性肿瘤,但双侧转移至腮腺的Rb很少见。据我们所知,双侧Rb转移至腮腺的情况非常罕见,这是迄今为止世界文学报道中的第二例,该病例是一名2岁男童因左眼双侧Rb左眼伸张而后来复发左腮腺转移需要腮腺切除术。一年后,他再次出现了肿胀的左腮腺区域,从枕骨区域延伸到左前胸壁,并在磁共振成像上进行了颅内延伸。腮腺肿胀的组织病理学检查和免疫组化显示Rb有转移。他接受了化学疗法治疗,然后对局部部位和大脑进行了放射治疗,对他的反应良好。目前,定期随访,无局部和远端转移的迹象。迄今为止,文献中已经报道了不同类型的原发腮腺肿瘤,但是转移性腮腺肿瘤极为罕见,因此,据报道该病例突出了这种疾病的极端稀有性,诊断和治疗挑战,高度侵袭性和总体预后不良疾病实体。

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