The term lymphoepithelioma
refers to an undifferentiated nasopharyngeal carcinoma, characterized by epithelial neoplastic cells growing in solid or discohesive sheets intermingled with a prominent lymphoid infiltrate .
Morphologically, the tumor resembled nasopharyngeal lymphoepithelioma
(old terminology for undifferentiated nasopharyngeal carcinoma) and other similar tumors occurring in different organs such as the stomach, salivary glands, lungs, thyroid, and uterus .
 (%) (%) SCC 93.35 96 90.3 Adenocarcinoma 0.38 -- Adenoid cystic 1.71 2.5 4 carcinoma Mucoepidermoid 0.19 0.75 Anaplastic carcinoma 3.23 -- 4.6 Malignant melanoma 0.19 -- -- Non Hodgkin lymphoma 0.38 -- -- Lymphoepithelioma
0.57 -- -- Verrucous -- -- 1.1 carcinoma Acinar cell -- -- -- carcinoma Embryonal RMS -- -- -- Fibro sarcoma -- 0.75 -- Kaposi sarcoma Osteosarcoma Others Histological Wahid Bhattacharjee  typing et al.
Out of the 52 cases diagnosed as NPC, 37 were squamous cell carcinomas (WHO Grade I), nine were non-keratinizing squamous carcinomas (WHO grade II), and six were lymphoepithelioma
type carcinomas (WHO grade III).
Adsay et al (46) have described a subtype of ductal carcinoma with a foamy gland pattern having a deceptively benign appearance and Wilenz et al (47) have identified a medullary carcinoma characterized by a solid, sometimes lymphoepithelioma
like pattern of growth, usually wild type (non-mutated) KRAS, and occasional multicentricity.
nonkeratinizing undifferentiated form also known as lymphoepithelioma
is most common.
Prostatic adenocarcinoma has many histological variants including atrophic, pseudohyperplastic, foamy gland, colloid, signet ring, lymphoepithelioma
like and sarcomatoid variant.
There was only one case of nasopharyngeal lymphoma and one case of lymphoepithelioma
found, representing 3.8% each of the total number of cases [Figure 5].
Lymphoepithelioma-like ATC is a subtype of epithelioid-squamoid ATC characterized by histologic features similar to those of lymphoepithelioma
of the nasopharynx and lymphoepithelioma-like carcinoma (LELC) of other sites .
, otherwise known as poorly differentiated carcinoma commonly occurs in nasopharynx.
is a malignant tumour found in the nasopharynx.