Bilateral dysgenetic polycystic parotid glands. Morphological analysis and differential diagnosis of a rare disease of the salivary glands

Dysgenetic Polycystic Disease of the Salivary Glands: A Case Report of This Rare Entity Occurring for the First Time in the Minor Salivary Glands of the Tongue, and a Review of the Literature

Dysgenetic polycystic disease, also known just as polycystic disease, is a very rare developmental abnormality affecting the salivary gland duct system. This entity has been reported in only 21 patients previously, although a careful review suggests only 16 patients have histological evidence of the disease. In previously reported cases, this lesion most commonly presents as either an incidental finding or as a swelling affecting the parotid glands bilaterally, or rarely the submandibular glands bilaterally. This case report details the first time dysgenetic polycystic disease is found affecting the minor salivary glands of the tongue in a 55-year-old male. Histochemical and immunohistochemical stains are presented and include positivity for AE1/AE3 and p63, and negativity for progesterone receptor, androgen receptor, mammaglobin, S100 and BRAF V600E. PAS-D and Congo Red highlight special microamyloid spheroliths structures intraluminally.

Sclerosing Polycystic Adenoma: Conclusive Clinical and Molecular Evidence of Its Neoplastic Nature

Sclerosing polycystic adenosis, initially considered a non-neoplastic salivary gland lesion and classified as such in the 2017 WHO Classification of Head and Neck Tumors, has been the subject of controversy regarding its possible neoplastic nature. The reporting of recurrent PI3K pathway alteration represents evidence to support these lesions as being neoplastic and more appropriately referred to as sclerosing polycystic adenoma (SPA). Herein, we provide additional evidence that supports the classification of SPA as a true neoplasm. Eight cases of SPA were identified in our database and consultation files. All cases were subjected to PTEN immunohistochemistry (IHC) and next-generation sequencing (NGS). In addition, one patient underwent genetic counseling and germline testing. The cases included 5 men and 3 women with a mean age of 41 years (range 11-78) and all tumors arose in the parotid gland. One patient had multiple recurrences over a period of 2 years. Morphologically the tumors were circumscribed and characterized by an admixture of acini, ducts and cysts embedded in a fibrotic/sclerotic stroma. The cells lining the ducts and cysts showed variable granular, vacuolated, foamy and apocrine cytoplasmic features, as well as acinar cells contained intracytoplasmic brightly eosinophilic granules. The apocrine intraductal proliferations showed mild to moderate atypia in 6 cases. One case showed overt malignant morphology that ranged from intraductal carcinoma to invasive salivary duct carcinoma. Seven cases tested for PTEN IHC showed loss of nuclear expression in the acinar and ductal cells with retained PTEN expression in the myoepithelial cell and stroma. NGS detected PIK3CA or PIK3R1 genetic alterations in 7 cases, including a novel TFG-PIK3CA fusion. Coexisting PTEN mutations were seen in 4 cases, including in a patient with clinical stigmata of Cowden syndrome and confirmed by germline genetic testing. Our findings herein documented including recurrence of tumor, malignant transformation, high prevalence of PI3K pathway oncogenic alterations and the possible heretofore undescribed association with Cowden syndrome add support to classifying SPA as true neoplasms justifying their designation as adenoma, rather than adenosis.

Stensen duct dilation: Case series of minimally invasive treatment

Stensen's duct dilation is a rare condition characterized by a global or partial idiopathic dilation of the Stensen duct. Affected individuals usually show either aesthetically compromised features, such as a tubular-shaped swelling in the cheek, or with mildly painful inflammatory episodes. Three women between ages 61 and 67 years were diagnosed with Stensen duct dilation after sialo-magnetic resonance imaging (MRI). They were treated with botulinum toxin A (BTX-A). Our preliminary results suggest that BTX-A was efficient as a suspensive treatment. BTX-A should remain a first-line treatment of the early silent symptoms of Stensen duct dilation, such as swelling and aesthetic issues. The use of BTX-A avoids more serious procedures and further complications.

[Pediatric salivary gland tumors and tumor-like lesions]

Salivary gland tumors and tumor-like lesions in the pediatric population are uncommon. They comprise a heterogeneous group of infectious/inflammatory and neoplastic conditions. Pediatric salivary neoplasms include benign tumors of mesenchymal or epithelial origin as well as malignancies of epithelial (carcinomas), mesenchymal (sarcoma) or hematolymphoid (lymphoma) derivation. Infectious/inflammatory conditions and hematolymphoid malignancies may represent either genuine parenchymal pathology or conditions involving intraglandular lymph nodes of the parotid glands (intraglandular lymphadenopathy and intraglandular nodal lymphomas). Pediatric sialadenitis may be of diverse etiologies including viral (mumps, CMV, HIV, etc.), bacterial, autoimmune (juvenile Sjögren syndrome) or idiopathic (chronic recurrent juvenile sialectatic sialadenitis). Angiomatous lesions (juvenile capillary hemangioma, lymphangioma and vascular malformation) and pleomorphic adenomas represent the most common pediatric benign mesenchymal and benign epithelial tumors, respectively. The vast majority of salivary gland carcinomas in children and adolescents represent low-grade mucoepidermoid carcinomas followed by acinic cell and adenoid cystic carcinomas (together >80% of carcinomas). Other malignant neoplasms include (rhabdomyo-) sarcomas, malignant lymphomas and very rarely sialoblastomas. This long differential diagnosis list of etiologically and biologically highly heterogeneous entities, their shared clinical presentation as "salivary gland enlargement" and the significant differences in their therapeutic strategies and prognosis underline the need for careful assessment to identify the correct diagnosis. Diagnosis is mainly based on a set of typical clinical and imaging features, serological/microbiological findings and, in selected cases, histomorphological characteristics in biopsy specimens.

Diagnostic Approach to Fine Needle Aspirations of Cystic Lesions of the Salivary Gland

Fine needle aspiration (FNA) has diagnostic and therapeutic value in the management of salivary gland cysts. Rendering an accurate diagnosis from an aspirated salivary gland cyst is challenging because of the broad differential diagnosis, possibility of sampling error, frequent hypocellularity of specimens, morphologic heterogeneity, and overlapping cytomorphology of many cystic entities. To date, there have been no comprehensive review articles providing a practical diagnostic approach to FNA of cystic lesions of salivary glands. This article reviews the cytopathology of salivary gland cysts employing 2017 World Health Organization terminology, addresses the accuracy of FNA, and presents The Milan System approach for reporting in cystic salivary gland cases. The utility of separating FNA specimens from salivary gland cysts, based upon the presence of mucin and admixed lymphocytes in cyst fluid is demonstrated. A reliable approach to interpreting FNA specimens from patients with cystic salivary gland lesions is essential to accurately determine which of these patients may require subsequent surgery.

Intraparotid ductal ectasia: rare cause of parotid swelling

A 41-year-old patient was hospitalised for a chronic right parotid mass. A cervical ultrasound revealed a cystic mass of the parotid. Cervical MRI found a ductal ectasia of the parotid and submandibular glands associated with a retention cyst of the right parotid. He had a right total parotidectomy. Histopathological examination of the lesion revealed a multilocular cystic mass with a diffuse glandular ectasia of salivary ducts. The patient had an uneventful postoperative course without any recurrence of symptoms.

Dysgenetic Polycystic Disease of Minor Salivary Gland: A Rare Case Report and Review of the Literature

Polycystic (dysgenetic) disease of the salivary glands is a rare entity that has only recently been described in the literature. The disease is more commonly seen in females and majority of the cases have presented as bilateral parotid gland swellings. This case presenting in a 21-year-old male is the first of this unusual entity involving solely the minor salivary gland on the lower lip. This case report highlights the importance for the clinician to be aware of this differential diagnosis, when treating an innocuous lesion like a mucocele.

Dysgenetic polycystic disease of the minor and submandibular salivary glands

BACKGROUND

Dysgenetic polycystic salivary gland disease is a rare pathology. No case of minor salivary gland involvement has been reported in the literature.

METHODS

A female patient presented with bilateral tumors of the parotid glands, bilateral submandibular gland enlargement, and multiple cystic lesions of the oral mucosa. MRI of the neck was performed along with fine-needle aspiration (FNA) of the parotid tumors and excisional biopsy of an oral lesion.

RESULTS

Imaging and FNA findings of the parotid glands were suggestive of bilateral Warthin tumors. Excisional biopsy of the oral lesion revealed a minor salivary gland with histopathological features of dysgenetic polycystic salivary gland disease. Submandibular gland enlargement was also attributed to this rare entity based on the imaging characteristics.

CONCLUSION

This is the first report of dysgenetic polycystic salivary gland disease of the minor salivary glands, combined with involvement of the submandibular glands and bilateral Warthin tumors of the parotid gland. © 2016 Wiley Periodicals, Inc. Head Neck 38: E2437-E2439, 2016.

Salivary gland diseases in children

Salivary gland diseases in children are rare, apart from viral-induced diseases. Nevertheless, it is essential for the otolaryngologist to recognize these uncommon findings in children and adolescents and to diagnose and initiate the proper treatment.

The present work provides an overview of the entire spectrum of congenital and acquired diseases of the salivary glands in childhood and adolescence. The current literature was reviewed and the results discussed and summarized.

Besides congenital diseases of the salivary glands in children, the main etiologies of viral and bacterial infections, autoimmune diseases and tumors of the salivary glands were considered. In addition to the known facts, new developments in diagnostics, imaging and therapy, including sialendoscopy in obstructive diseases and chronic recurrent juvenile sialadenitis were taken into account. In addition, systemic causes of salivary gland swelling and the treatment of sialorrhoea were discussed. Although salivary gland diseases in children are usually included in the pathology of the adult, they differ in their incidence and some­times in their symptoms. Clinical diagnostics and especially the surgical treatment are influenced by a stringent indications and a less invasive strategy. Due to the rarity of tumors of the salivary glands in children, it is recommended to treat them in a specialized center with greater surgical experience.

Altogether the knowledge of the differential diagnoses in salivary gland diseases in children is important for otolaryngologists, to indicate the proper therapeutic approach.

"Mustache sign" due to Stensen duct dilation

An 80-year-old woman presented with a 5-year history of painless swellings of the left and right cheeks. The degree of swelling did not change with mastication. On palpation, the cheeks were soft, well defined, and movable. Compression and massage of the swollen areas caused increased salivary discharge from the orifices of the Stensen ducts. Three-dimensional computed tomography showed well-bordered, 15- to 20-mm wide, bilateral, tube-like dilatations of the ducts. The ductal origin of the swellings was explained to the patient, but she refused invasive procedures, thus no sialogram or surgical procedure was performed. We describe the clinical and radiographic features of a case of bilateral, congenital Stensen duct dilatation with bilateral swelling of the cheeks.

Sclerosing polycystic adenosis of minor salivary glands: report of three cases and review of the literature

Sclerosing polycystic adenosis (SPCA) of the salivary gland is a rarely encountered lesion of uncertain pathogenesis that shares histologic features with sclerosing adenosis and fibrocystic disease of the mammary gland. To date, fewer than 40 cases of SPCA have been reported in the literature; all but one have arisen in the major salivary glands. We report 3 cases of SPCA involving minor salivary glands and discuss the characteristic histopathologic features of SPCA , which include a combination of fibrosis, tubuloacinar proliferation, and cystic change with retention of a somewhat lobular architecture. We also provide a review of contemporary relevant literature. Given that SPCA has been mistaken for malignant salivary gland neoplasia, a familiarity with the entity is critical. Three new cases of SPCA involving minor glands are added to 1 existing case in the literature to raise awareness of the lesion and to reduce the likelihood of misdiagnosis.

Cystic lesions of the salivary glands: cytologic features in fine-needle aspiration biopsies

A variety of neoplastic and nonneoplastic lesions of the salivary glands have a predominantly cystic architecture. Fine-needle aspirates of these lesions yield watery or mucoid material, frequently of low cellularity. Such aspirates may be obtained from mucus retention cysts, lymphoepithelial cysts, cystadenomas, Warthin's tumors, cystic pleomorphic adenomas, low-grade mucoepidermoid carcinomas, cystadenocarcinomas, and examples of polycystic disease of the parotid gland. The cellular component within the fluid obtained from these lesions may be exceedingly scant or absent, making cytologic diagnosis difficult and, at times, impossible. We studied a series of 56 cystic lesions of the salivary glands, including 38 Warthin's tumors, 6 benign cysts, 2 lymphoepithelial cysts, 5 low-grade mucoepidermoid carcinomas, 1 cystic pleomorphic adenoma, 2 cystadenomas, and 2 cystadenocarcinomas. Careful attention to the cellular elements present often allowed definitive cytologic diagnosis, with an overall accuracy rate of 84%. The presence of atypical squamous metaplasia in oncocytic lesions was a significant cause of false-positive diagnoses of carcinoma (4 cases, 7%). Aspirates of low-grade mucoepidermoid carcinoma may contain no epithelial cells and result in false-negative diagnoses (1 case, 2%).

Histologic and fine-needle aspiration cytologic features of polycystic disease of the parotid glands: case report and review of the literature

Polycystic disease of the parotid glands is a rare disorder, with only eight examples to our knowledge being reported in the literature. The disease presents as a painless enlargement of one or both parotid glands and does not appear to be associated with other disease processes within the head and neck, or with polycystic disease of the kidney, pancreas, or congenital fibrosis of the liver. The histology has been well described. The overall glandular architecture is preserved but the lobules are markedly distended by cysts whose lining appears to be intercalated duct in differentiation. Characteristic eosinophilic laminated spheroliths lie in many of the cystic spaces. Aspirate smears are characterized by a relatively clean background in which are distributed histiocytes, red blood cells, and small clusters of ductal epithelial cells. Polycystic disease of the parotid glands must be differentiated cytologically from mucous retention reaction, mucoceles, benign lymphoepithelial cysts, and cystic neoplasms, including Warthin's tumor, low-grade mucoepidermoid carcinoma, cystadenoma, and papillary cystadenocarcinoma.

Salivary gland disorders and heredity

From personal observations, I review the genetic disorders of salivary gland development and function, including the lacrimo-auriculodentodigital (LADD) syndrome, autosomal dominant hypoplasia/agenesis of salivary and/or lacrimal glands, chronic recurrent sialadenitis, polycystic-dysgenetic disease of the parotids and salivary calculi.

Polycystic disease of salivary glands

Polycystic disease of salivary glands is a rare condition which hitherto has been reported only in the parotid glands. We report a case in which an accessory salivary gland had evidence of polycystic disease.

Polycystic disease of the parotid glands: two familial cases

Polycystic (dysgenetic) disease of the parotid glands is a rare disorder with only three fully documented reports in the literature containing a total of six cases. This developmental disorder of the distal ductal system appears limited to the parotid glands of female patients and is usually bilateral. We present two further cases with a confirmed familial background to add to the literature. This is the first documented report of familial polycystic disease of the parotid glands. The pathogenesis, mode of inheritance, clinical features, histological appearance and management of this interesting condition are discussed.

Polycystic parotid disease: a case report

A case report of a 14-year-old girl, presumed to have PPD, is presented. Those manifestations of this patient's disease that can be added to the classic picture of PPD include a decreased salivary flow rate and a sialochemistry that reflects a mild chronic parotitis. In addition, cysts and sialoliths were demonstrated grossly rather than microscopically.

Sialocysts of the parotid glands

Sialocysts of salivary glands are outnumbered greatly by pseudocystic lesions, exemplified by mucoceles. In the major salivary glands, sialocysts are preponderantly lesions of the parotid glands, where they are classified as 1) salivary duct cysts, 2) lymphoepithelial cysts, or 3) dysgenetic or congenital cysts. All arise from salivary ducts and have no relation with the branchial apparatus.

Polycystic disease of the parotid glands: case report of a rare entity and review of the literature

We report a case of polycystic disease of the parotid glands. This is a rare disorder and we know of only two previous documented cases in the literature. The disease presents with painless enlargement of one or both parotid glands and is not associated with any clinical abnormality of salivation or with any apparent anomaly of the other salivary glands. Histologically, the overall glandular architecture is preserved but the lobules are all markedly distended by epithelial-lined cysts, which appear to be derived from the intercalated ducts. Characteristic congophilic laminated spheroliths are present within the cystic spaces. The condition must be differentiated from cystic neoplasms, particularly papillary cystic adenocarcinoma, and from various non-neoplastic disorders including sialectasia, retention cysts and lymphoepithelial cysts.

Detection of a cytokeratin determinant common to diverse epithelial cells by a broadly cross-reacting monoclonal antibody

A monoclonal antibody derived from a mouse immunized with bovine epidermal prekeratin has been characterized by its binding to cytoskeletal polypeptides separated by one- or two-dimensional gel electrophoresis and by immunofluorescence microscopy. This antibody (KG 8.13) binds to a determinant present in a large number of human cytokeratin polypeptides, notably some polypeptides (Nos. 1, 5, 6, 7, and 8) of the 'basic cytokeratin subfamily' defined by peptide mapping, as well as a few acidic cytokeratins such as the epidermis-specific cytokeratins Nos. 10 and 11 and the more widespread cytokeratin No. 18. This antibody reacts specifically with a wide variety of epithelial tissues and cultured epithelial cells, in agreement with previous findings that at least one polypeptide of the basic cytokeratin subfamily is present in all normal and neoplastic epithelial cells so far examined. The antibody also reacts with corresponding cytokeratin polypeptides in a broad range of species including man, cow, chick, and amphibia but shows only limited reactivity with only a few rodent cytokeratins. The value of this broad-range monoclonal antibody, which apparently recognizes a stable cytokeratin determinant ubiquitous in human epithelia, for the immunohistochemical identification of epithelia and carcinomas is discussed.