Low-grade salivary duct carcinoma is a rare neoplasm. We report on 16 patients, with a median age of 64 years. All but one tumor arose from the parotid gland, including one tumor that arose in an intraparotid lymph node; one arose in the submandibular gland. Tumors consist of single to multiple dominant cysts, accompanied by adjacent intraductal proliferation. Cysts are lined by small, multilayered, proliferating, bland ductal cells with finely dispersed chromatin and small nucleoli. Separate, smaller ductal structures are variably filled by proliferating ductal epithelium with cribriform, micropapillary, and solid areas. The overall appearance is very similar to breast atypical ductal hyperplasia and low-grade ductal carcinoma in situ. Foci of definitive stromal invasion were seen in four tumors. Two tumors demonstrated transition from low- to intermediate- or high-grade cytology, with scattered mitotic figures and focal necrosis. S-100 revealed diffuse strong expression in all 9 cases studied. Myoepithelial markers (calponin) highlighted supportive myoepithelial cells rimming the cystic spaces, confirming the intraductal nature of most, or all, of six tumors studied. Nine tumors studied for Her2-neu antigen were uniformly negative. Follow-up was obtained on 13 of our 16 patients. All patients were disease-free after surgery 6 to 132 months (median 30 months). Low-grade salivary duct carcinoma is a low-grade neoplasm with an excellent prognosis; it may be treated by conservative but complete resection. Its resemblance to atypical breast ductal hyperplasia, or micropapillary/cribriform intraductal carcinoma, distinguishes it from high-grade salivary duct carcinoma, papillocystic acinic cell carcinoma, and cystadenocarcinoma.
"All 10 cases in the Delgado et al.4 report were tumors that presented in the parotid gland, and none of the patients died from the disease during the follow-up period. Brandwein-Gensler et al.5 reported 16 more cases of LGSDC in 2004, and all patients in their report had a favorable prognosis as well. "
[Show abstract][Hide abstract] ABSTRACT: Low-grade cribriform cystadenocarcinoma (LGCCC) is a rare salivary gland tumor that was recently defined as a variant of cystadenocarcinoma by the 2005 World Health Orgazniation (WHO) classification system. We report cytologic findings of an unusual case of LGCCC with many psammoma bodies. A 90-year-old man presented a palpable mass on his left parotid gland. Fine-needle aspiration (FNA) cytology showed tumor cells that were arranged in clusters and dispersed individually. The tumor cells showed mild atypia and had clear or dense cytoplasm with some vacuoles. Numerous psammoma bodies were noted. After surgical resection, the histologic examination revealed a mixed solid and cystic mass showing intraductal growth with focal stromal invasion. The S-100 protein expressed in the tumor cells, but smooth muscle actin and p63 were positive only in myoepithelial cells. Although LGCCCs resemble other salivary gland tumors, differentiating LGCCC during preoperative FNA is important to avoid unnecessary overtreatment.
The Korean Journal of Pathology 10/2013; 47(5):481-485. DOI:10.4132/KoreanJPathol.2013.47.5.481 · 0.17 Impact Factor
"Parotid gland is the most common site of involvement [1-6]. Presentation in the palate , submandibular gland , intraparotid lymph node [2,6] and accessory parotid gland  may occur but rare. LGCCC is characterized by the papillary-cystic or cribriform proliferation pattern and resembles the low-grade ductal carcinoma in situ or atypical ductal hyperplasia of the breast in histology and biological features. "
[Show abstract][Hide abstract] ABSTRACT: Low-grade cribriform cystadenocarcinoma (LGCCC) is a recently described rare tumor of salivary gland which exhibits clinically indolent behavior. This tumor predominantly consists of intraductal components and frequently exhibits papillary-cystic or cribriform proliferation pattern. Considering the histological features of LGCCC, it should be distinguished with papillocystic variant of acinic cell carcinoma, conventional salivary duct carcinoma, cystadenocarcinoma, polymorphous low-grade adenocarcinoma, carcinoma ex pleomorphic adenoma and mammary analogue secretory carcinoma. Herein, we presented two cases of LGCCC. One arose in the left parotid region in a 48-year-old male, and the other one arose in the right parotid gland in a 59-year-old female. For both cases, immunohistochemically, the luminal tumor cells showed diffuse expression of CK and S100; p63 and smooth muscle actin displayed a continuous rim of myoepithelial cells around all tumor islets; no myoepithelial cells were admixed with the luminal cells. Both patients were alive with no tumor recurrence or metastasis at follow-up.
The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/2593621568999135
"However, the cells failed to stain with either PAS-D or AB in smears or sections in this study. This is in contrast to the observations of Genester et al. who reported presence of apocrine type PAS-D-positive cytoplasmic vacuoles in salivary duct carcinoma.This suggests the possibility of existence of mucinous variant of salivary duct carcinoma as has been reported by Simson et al. The main differential diagnosis here is with high grade mucoepidermoid carcinoma. "
[Show abstract][Hide abstract] ABSTRACT: Fine needle aspiration cytology (FNAC) is extensively used in the diagnosis of various clinically palpable lesions of breast and salivary glands. Much interest has been gained in mucosubstances produced in tumors arising from these organs.
To evaluate the utility of Periodic acid Schiff with diastase (PAS-D) and Alcian blue (AB) staining pattern on fine needle aspirates of breast and salivary gland neoplasms.
Seventy-five cases of different neoplasm of breast and salivary gland were studied. The staining pattern of PAS-D and AB stains on smears of these neoplasm were observed.
Among cases of neoplasms of breast, intracytoplasmic PAS-D positive globules were restricted to carcinoma except in one case where PAS-D-positive globules were seen in fibroadenoma. The background substance of both mucinous carcinoma and fibroadenoma with myxoid change stained positive with PAS-D, but the pattern was different. The cases of pleomorphic adenoma and mucoepidermoid carcinoma of salivary gland showed intracytoplasmic PAS-D-positive globules. The cases of pleomorphic adenoma showed stromal positivity which was not seen in basal cell adenoma on smears.
Intracytoplasmic PAS-D-positive globules may be useful in differentiating benign and malignant lesions of breast. The presence of PAS-D positive granules are useful in differentiating various lesions of salivary glands. AB staining of stromal fragments in pleomorphic adenoma is useful in differentiating it from basal cell adenoma.
Journal of Cytology 10/2012; 29(4):221-5. DOI:10.4103/0970-9371.103938 · 0.37 Impact Factor
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