Excretory duct/main excretory duct (ED/MED): These are characterized as being covered by a simple columnar epithelium
with eosinophil cytoplasm cells with few basal striations (Fig.
Anatomically, the SCJ is the border between the squamous epithelium and the mucin-producing columnar epithelium
of the cervix.
The lumen of the spermathecal reservoir was lined by a single layered columnar epithelium
(Figure 2A, B) with the nucleus placed in the center of the cell with a predominance of decondensed chromatin (Figure 2B).
Pleural histology showed occasional strips of columnar epithelium
, with ciliated metaplasia on the surface of the pleura.
Pathological examination revealed gastric adenomyoma, which was composed of cysts and glandular structures lined by cuboidal to columnar epithelium
surrounded by hypertrophic smooth muscle bundles.
The cells in the inner mucosal layer were taller than broader with oval nuclei giving the appearance of simple columnar epithelium
resting on the basement membrane.
 Goblet cells appear early in development (In the human foetal small intestine, at 9-10 weeks' gestation) and relatively undifferentiated oligomucous and mature goblet cells are present in both the stratified and simple columnar epithelium
; however, once the villi have formed, most goblet cells are indistinguishable from those found in the adult intestine.
Pathological assessment revealed hyperkeratosis, epidermal acanthosis and a well-circumscribed neoplastic tumor composed of papillary projection lined by columnar epithelium
with decapitating secretion that was diagnostic for Hidradenoma papilliferum (Figure 2).
In the histological examination, the cyst was lined by flattened, cuboidal or ciliated columnar epithelium
supported by underlying fibrous stroma (Figure 2b).
The sinus tract for each patient was lined with pseudostratified columnar epithelium
with seromucinous glands.
Barrett's esophagus (BE), a condition wherein metaplastic columnar epithelium
replaces normal stratified squamous epithelium, is a consequence of chronic esophageal mucosal injury caused by gastroesophageal reflux disease (GERD) .
Histopathology from this specimen revealed a benign cyst lined with ciliated columnar epithelium