An Insight into the Histopathology of Oral Neoplasms with Basaloid Morphology and a Working Classification (original) (raw)
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Case Reports in Dentistry
Basaloid squamous cell carcinoma (BSCC) is a rare, distinctive, and aggressive variant of squamous cell carcinoma (SCC) primarily seen in the upper aerodigestive tract with epiglottis, soft palate, and base of the tongue being site of high preference in head and neck region. It differs from conventional SCC histologically and immunologically, is most frequently found in males in their sixth and seventh decades, and is frequently linked to alcohol and tobacco use. High stage disease with distant metastases, a high recurrence rate, and a dismal prognosis is how BSCC typically manifests. In the present article, we report four cases of BSCC.
Pathologies En-Route of Oral Basaloid Malignancies to Basaloid Squamous Cell Carcinoma
Kathmandu University Medical Journal, 2015
Accurate histopathological diagnosis of any tumour is imperative because of variable prognostic and clinical implications. Basaloid squamous cell carcinoma (BSCC) is a rare distinctive histological variant of oral squamous cell carcinoma (OSCC) exhibiting an aggressive clinical course and poor prognosis. The advanced stage of presentation is speculatively responsible for this biological behaviour which is manifested by development of metastasis and subsequently poor survival. However, the non-specific clinical appearance and histopathological resemblance of BSCC with OSCC and other oral basaloid malignancies (OBM) especially in limited sample size poses diagnostic difficulties. The article emphasizes on the diagnostic criteria and pitfalls encountered in making the differential diagnosis of BSCC from OBMs along with report of a case presented at a dental college in January 2012.
Basal Cell Adenocarcinoma in the Tongue: An Unusual Presentation
Clinical Medicine Insights: Oncology, 2010
We present a case of basal cell adenocarcinoma (BCAC) in the tongue in a 65-year old male. This is an extremely rare presentation. BCAC generally occurs in the parotid gland and rarely involves the minor salivary glands. Few cases have been reported in literature with a variable presentation. The biopsy was formalin-fixed and paraffin-embedded. The sections were stained with routine Hematoxylin and Eosin. Immunohistochemistry was performed. Hematoxylin and eosin staining showed tumour composed of variable sized and shaped, nests and sheets of basaloid epithelial cells having hyperchromatic to vesicular nuclei. Immunohistochemistry was positive for Pancytokeratin, Epithelial membrane antigen and p53. The clinicopathological features and the cellular immunophenotype addressed the diagnosis towards BCAC of the tongue. The goal of this report is to increase awareness of this rare disease and to review and discuss the differential diagnosis and important considerations in treatment.
Pathology International, 1998
Two cases of basalold-squamous cell carcinoma (BSC) of the oral mucosa are described. The first case occurred at the floor of the mouth in a 58-year-old man, and the second case occurred at the mandibular gingiva in a 79-year-old woman. The laboratory data of the first case showed a positive response to hepatitis C virus antibody. in the first case, the tumor mass measured 4 times 4 cm in size, and was i-texl at the lingual side of the median mandible beside the sublingual gland. In the second case, the tumor mass measured 25 times 15 mm In size, and was located in the alveolar mucosa of the right mandible. Histologically, both tumors showed a neoplastic epithelium arranged in a solid pattern with evidence of peripheral palisading, central necrosis, and some squamous differentiation. The pro-ilferathfe activities of the BSC were compared with conventional squamous cell carcinomas (SCC) in the oral floor and gingiva, respectively, by employing a sensitive argy-rophillc nuclear organizer region (AgNOR) staining method. The number of AgNOR per nucleus of the BSC was higher than that of any other SCC cases. The results support the opinion that BSC of the oral mucosa has a worse prognosis than conventional SCC.
Basal cell adenocarcinoma of the tongue- A rarity Case report
ARS Medica Tomitana, 2017
Basal cell adenocarcinoma is an unusual basaloid tumour that usually affects the parotid and very rarely involves the submandibular or minor salivary glands. It constitutes 1.6% of all salivary gland tumours and occurs as an asymptomatic freely mobile mass with occasional lymph node metastasis. Differentiation from benign salivary gland tumours like basal cell adenoma is accomplished by determining the depth of tumour invasion and patterns of growth or infiltration. Although it is categorised as a low-grade malignancy, it has a high propensity for recurrence. Surgical excision with a wide margin is the preferred course of treatment with radiotherapy being reserved only for tumours of the minor salivary glands with a diffuse pattern of infiltration. We present here a case of basal cell adenocarcinoma with a rare presentation in the minor salivary glands of the tongue which arose from a previously treated basal cell adenoma in the same site.
Basal Cell Adenoma of Palate, a Rare Occurrence with Review of Literature
Journal of dentistry (Shīrāz, Iran), 2015
Basal cell adenoma is an uncommon benign epithelial neoplasm of salivary gland which derives its name from the basaloid appearance of tumor cells and accounting for 1-2 % of all salivary gland epithelial tumors. This tumor usually arises in the major salivary glands, with the parotid being the most frequent site of occurrence, followed by the upper lip; while it is very rare in the minor salivary glands. Microscopically, it is composed of isomorphic cells similar to basal cells with nuclear palisading. We report a case of BCA presenting as an asymptomatic swelling over the right side of palate of 55-year-old female patient. A follow-up of 1 year revealed no recurrence. This report emphasizes the rare site of occurrence of this tumor and briefly reviews the literature.
Basal Cell Adenoma of Salivary Gland; Cytologic Features and Differential Diagnosis
2009
Herein, a case of Basal Cell Adenoma of the parotid gland is presented, especially with cytologic features and cytologic differential diagnosis was discussed. Basal Cell Adenoma is a rare neoplasm which is one of the basaloid neoplasms of salivary gland cytologically. Basaloid neoplasms are the most difficult problem in salivary gland Fine Needle Aspiration Cytology. There are various benign and malignant tumors such as; cellular pleomorphic adenoma, basal cell adenocarcinoma, adenoid cystic carcinoma, metastatic basal cell carcinoma, metastatic basaloid squamous carcinoma and small cell carcinoma in differential diagnosis. Fine Needle Aspiration Cytology in salivary gland lesions can provide a diagnosis that eliminates the need for surgery in non-neoplastic lesions and guides treatment decision.
Basaloid squamous cell carcinoma of oral cavity with incongruent clinical course
BMJ case reports, 2013
Basaloid squamous cell carcinoma (BSCC) is a rare variant of SCC having a marked predilection for the upper aerodigestive tract. It is regarded as a high-grade tumour with increased propensity for metastasis to distant sites. The histological hallmark of BSCC is its dimorphic pattern of presentation with a characteristic basal cell component associated with squamous component. We report two cases of BSCC on the buccal mucosa and gingiva, respectively, with the former presenting as a primary lesion in a patient without a positive history of tobacco and alcohol use and the latter present as a seemingly metachronous development from carcinoma lung. The proliferative index of the two diverse yet similar entities was assessed by Ki-67 labelling index (LI) and the association of human papillomavirus (HPV) was detected with p16 monoclonal antibody. The intrinsically aggressive behaviour of BSCC and its association with HPV is highlighted.
An unusual case report of basal cell adenoma: A Diagnostic Enchanter
Journal of Clinical and Experimental Dentistry
Oral lesions show a wide range of biologic behaviours. There are various lesions which may mimic others and present in such an unusual manner thus making them very difficult to diagnose clinico-pathologically. An accurate diagnosis is not only important for correct treatment planning but also for determination of prognosis. Thus, it is very important for a surgical pathologist to be aware of the various atypical presentations of the lesions. The present unusual case report of basal cell adenoma occurring on upper lip with frank areas of calcifications and abundant inspissated mucoid secretions is an example of one such case. BCA is an uncommon benign epithelial salivary gland neoplasm. It is one of the nine subcategories of salivary gland epithelial tumours according to WHO 2005 classification of salivary gland tumors. It is composed of basaloid cells organized with a prominent basal cell layer and distinct basement membrane-like structure and no myxochondroid stromal component as seen in pleomorphic adenomas. To our best knowledge, no case in English literature has been reported BCA with exuberant inspissated mucoid secretions and frank areas of calcifications to such a large extent and this is the first case to report the same.