Crystalloid granuloma of the parotid gland: a case report

A case of an uncommon granulomatous lesion of the parotid gland is presented. A tumorous lesion was pointed out in the upper left neck region of a 63 year old Japanese female and then extirpated. Histologically, the tumor arose in the parotid gland and showed a chronic granulomatous lesion with lymphocytes and histiocytic cells, including the multinucleated foreign body type. In addition, numerous so-called crystalloids were deposited throughout the lesion. The crystalloids were partially positive on von Kossa's stain and nonbirefringent under polarized light. To the authors' knowledge, this is the second reported case of crystalloid granuloma of the parotid gland since the first one was described by Takeda in 1991.