Among the benign lesions that showed a washout kinetic pattern, fibrocystic changes comprised 35% (6 of 17), closely followed by normal breast tissue (24%; 4 of 17) and columnar cell
lesions (12%; 2 of 17).
The apical surface of the columnar cells
was elaborated into microplicae (Figs.
6%) 5 FCD with columnar cell
change -- 8 (21%) with UDH 5 Adenosis with Usual Lobular 10 (2.
However, the gyrate, concentric, whorled pattern of a breast tumor resembling the tall cell variant of papillary thyroid carcinoma is characteristic, as is the reverse polarity of the columnar cells
The radiating ducts often demonstrate a spectrum of nonproliferative and proliferative change, including columnar cell
change, adenosis, apocrine metaplasia, ductal hyperplasia, and papillomata (Figure 7, D).
The columnar cell
variant of PTC can pose a diagnostic challenge.
A coexisting columnar cell
lesion was present on needle core biopsy in 36 of the 61 cases (59%).
However, noninvasive urothelial carcinoma with glandular differentiation contains atypical columnar cells
, exhibits true glandular and urothelial differentiation, and lacks stromal invasion--all features that help differentiate this entity from its morphologic mimics.
papilloma is an uncommon (3-5%) variant of Schneiderian papilloma.
Significance of acid-mucin-positive nongoblet columnar cells
in the distal esophagus and gastroesophageal junction.
In contrast, the columnar cell
type shows a high TP53 mutational frequency, with G to T transversions, considered to be caused by exogenous carcinogenic agents like those found in tobacco smoke.
1) POTs are histopathologically characterized by a loose connective tissue stroma resembling dental papilla, lined by a single layer of columnar cells