2 cm tubulovillous adenoma invading the lamina propria with no muscularis mucosa
A transurethral resection of a bladder tumour (TURBT) was performed and confirmed poorly differentiated transitional cell (TCC) with extensive invasion of the fibrous lamina propria and muscularis mucosa
, but questionable involvement of the muscularis propria.
Histology demonstrated features of a classical neuroendocrine carcinoid tumour infiltrating the muscularis mucosa
Vertical penetration into the bowel wall is limited due to the resistance of the underlying muscularis mucosa
, thus resulting in the discoid collar button appearance of these ulcers.
The lamina propria and muscularis mucosa
of the inner mucus membrane was normal, and the vascular endothelium was regular.
Occurring at the base of the glands are a few layers of smooth-muscle cells that resemble muscularis mucosa
In addition, contraction causing partial separation of the inner and outer layers of the muscularis mucosa
added to the thickening.
He reviewed 78 cases of esophageal adenocarcinoma with invasion through the basement membrane into the lamina propria, but not through the muscularis mucosa
Reduplication of the muscularis mucosa
is a frequent finding.
Just beneath the muscularis mucosa
, a nodular, plexiform tumour was seen.
Stricturing is mostly the result of hypertrophy and thickening of the muscularis mucosa
In our experience, patient 1 had occasional cancer cells in mucin pools extending 14 mm beyond the muscularis mucosa
, but circumferential resection margin was not compromised (2 mm).