Langerhans cell histiocytosis in an old man – Case report

Cosmetic materials-induced foreign body granuloma at the lower lip

“…In contrast, if a 5:1 dilution of sculptra is used for injection, the occurrence rate of the late-onset sculptra nodule is 0.13%, suggesting that the lower concentration of the injectable poly- l -lactic acid significantly reduce the occurrence rate of the late-onset sculptra nodule. 1 , 2 Although immunohistochemical stains are frequently used for identification of specific cell type or tumor cell origin, 4 , 5 they are not able to detect the poly- l -lactic acid in a foreign body granuloma. The intralesional injection of triamcinolone at 40 mg/cm 3 is the treatment of choice for the late-onset sculptra nodules.…”

Mucus retention cyst with oncocytic metaplasia of the epithelial lining

“…Although the immunostain is very useful for the identification of tumor cell type and origin, the diagnosis of a mucus retention cyst does not need the assistance of the immunostain. 3 , 4 , 5 It is still controversial whether the mucus retention cyst is a true cyst or merely represents salivary ductal ectasia secondary to ductal obstruction (e.g., mucus plug). 1 , 2 In this case, mucus plugs were frequently found in the dilated excretory ducts of the adjacent minor labial glands.…”

Nasopalatine duct cyst – Case report

“… 1 Immunohistochemical stain is frequently used to identify the origin of the tumor cells. 2 , 3 , 4 , 5 However, the nasopalatine duct cyst does not need the immunostaining to confirm the origin of the lining epithelial cells. Because the incisive canal contains not only nasopalatine duct but also nasopalatine nerve and anastomosing branches of the descending palatine and sphenopalatine arteries, it is reasonable to find small to medium-sized nerves, arteries and veins in the surgical specimens of the nasopalatine duct cyst.…”