Papillary

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Papillae in the papillary variant of lung adenocarcinoma. H&E stain. (WC/Nephron)

In pathology, papillary refers to a nipple-like projection with a fibrovascular core.

Papillary pattern redirects here.

General

  • Common histomorphologic pattern that is seen in a large number of contexts.

Microscopy

Histologic definition - papilla:

  • Nipple-shaped structure consisting of epithelium on a fibrovascular core.
    • Fibrovascular core = fibrous tissue + least one blood vessel.

Note:

DDx:

  • Micropapilla - nipple-shaped structure without blood vessels; usually smaller than papillae.
  • Pseudopapilla - cells distant from the blood vessels undergo necrosis imparting a papillary-like appearance, e.g. solid pseudopapillary tumour.

Some entities with the word papillary

Breast pathology

Cardiovascular pathology

Dermatopathology

Endocrine pathology

Gastrointestinal pathology

Genitourinary pathology

Gynecologic pathology

Head and neck pathology

Neuropathology

Other

See also