A Mandibular Brown Tumor: A Pediatric Case Report and Summary of Adolescence Cases
FACE(2024)
Abstract
Mandibular brown tumors are often radiographically and histologically indistinguishable from cherubism, aneurysmal bone cyst, giant cell granuloma, and odontogenic fibroma. Laboratory findings of hyperparathyroidism (HPT) aid in directing therapy. We present a case of a 14-year-old male with a brown tumor of the mandible associated with secondary HPT due to vitamin D deficiency. Core biopsy exhibited a proliferation of plump spindle cells and osteoclast-like giant cells within variably fibrous stroma. Parathyroid hormone (PTH) levels were elevated to 288 pg/mL (normal 8.5-77.1 pg/mL) and vitamin D was low at a level of 6.9 ng/mL (normal > 20.0 ng/mL). Six months after the introduction of weekly vitamin D supplementation, PTH and vitamin D levels improved but remained abnormal with PTH of 86.8 pg/mL and vitamin D of 9.3 ng/mL. Alongside an improvement in laboratory indices, the tumor character stabilized and became less clinically friable; however, the burden remained unchanged. At 9 months, the patient underwent surgical debulking of the tumor with local soft tissue coverage. A review of pediatric literature was performed, among which 16 patients were identified. Most children who developed brown tumors were found to have secondary HPT and ultimately 44% underwent some degree of surgical debridement of the mass.
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