Humpath.com - Human pathology

Most recent articles

• ureteral papillary urothelial carcinoma

  24 May

  See also
  ureteral tumors
  papillary urothelial carcinoma

• pelvic papillary urothelial carcinoma

  24 May

  pelvic papillary urothelial carcinoma
  See also
  pelvic tumors
  papillary urothelial carcinoma

• low-grade papillary urothelial carcinoma...

  24 May

  WebPathology
  Low-grade papillary urothelial carcinoma shows minimal cytologic and architectural atypia. Adjacent papillary fronds may fuse.
  In a low-grade papillary urothelial carcinoma, the presence of scattered hyperchromatic nuclei and typical mitotic figures distinguish this lesion from the PUNLMP.
  See also
  high-grade papillary urothelial carcinoma

• Papillary Urothelial Neoplasm of Low Malignant Potential

  24 May

  PUNLMP - WHO/ISUP Classification, 2004 WebPathology
  Papillary urothelial neoplasms of low malignant potential (PUNLMP) show urothelial thickening but lack cytologic features of malignancy.
  The image shows several papillary fragments with an orderly arrangement of cells. Umbrella cell layer can be recognized even at low magnification.
  PUNLMPs are characterized by a homogenous monotonous appearance, normal to slightly enlarged nuclei and inconspicuous nucleoli. Mitotic figures are (...)

• urothelial papilloma

  24 May

  Webpathology
  Urothelial papilloma should be distinguished from "papillary urothelial neoplasm of low malignant potential" (PUNLMP) (WHO/ISUP Classification, 1998) (formerly Grade 1 (of 3) papillary transitional cell carcinoma, WHO Classification, 1973).
  Urothelial papilloma consists of papillary fronds containing delicate fibrovascular cores lined by less than 7 layers of cytologically and architecturally normal urothelium. Prominent cytoplasmic vacuoles are seen.
  Using criteria (...)

• urothelial tumors

  24 May

  transitional cell tumors
  Examples
  transitional cell carcinoma (TCC)

• transitional cell carcinoma

  24 May

  urothelial carcinoma WP
  Transitional cell carcinoma (TCC), also urothelial cell carcinoma or (UCC), is a type of cancer that typically occurs in the urinary system: the kidney, urinary bladder, and accessory organs. It is the most common type of bladder cancer and cancer of the ureter, urethra, and urachus. It is the second most common type of kidney cancer, but accounts for only five to 10 percent of all primary renal malignant tumors.
  TCC arises from the transitional epithelium, a (...)

• fibroepithelioma

  22 May

  Fibroepithelioma presents as a soft nodular lesion resembling a fibroma or papilloma, often on the lower part of the back.
  It is composed of thin anastomosing strands of basaloid cells set in a prominent loose stroma.
  The stroma has no elastic tissue.
  Merkel cells are quite prominent.
  It has been suggested, and subsequently disputed, that this variant derives its histological pattern from the spread of basal cell carcinoma down eccrine ducts, eventually replacing them with solid strands (...)

• basosquamous carcinoma

  22 May

  Basosquamous carcinoma is a controversial entity which can be defined as a basal cell carcinoma differentiating into a squamous cell carcinoma.
  It is composed of three types of cell:
  basaloid cells, which are slightly larger, paler and more rounded than the cells of a solid basal cell carcinoma;
  squamoid cells with copious eosinophilic cytoplasm;
  an intermediate cell which resembles that seen in metatypical tumors.
  Accordingly, the basosquamous carcinoma is sometimes confused with (...)

• metatypical basal cell carcinoma

  22 May

  Metatypical type
  Although the term ’metatypical’ is sometimes applied to tumors with mixed basaloid and squamous features, it should be reserved for the rare basal cell carcinoma composed of nests and strands of cells maturing into larger and paler cells.
  Peripheral palisading is often lost.
  The cells express much less keratin 17 and keratin 8 than do the cells in the more usual types of basal cell carcinoma.
  Peripheral palisading is less obvious than usual, and the stroma is often (...)

previous page | next page