Breast- Abundant periostin positive stroma in an invasive lobular breast cancer.

Colon – Intense stromal periostin immunostaining in a colorectal adenocarcinoma. Focal epithelial periostin staining may reflect a “contamination artifact” caused by the very high levels of periostin in the surrounding stroma.

Colon- Colorectal adenocarcinoma showing little periostin positive material in the stroma.

Esophagus – Squamous cell carcinoma containing highly abundant periostin in the stroma. Epithelial periostin staining could reflect a “contamination artifact” caused by the very high levels of periostin in the surrounding stroma.

Esophagus- Squamous cell carcinoma containing few periostin positive fibres in the stroma.

Kidney- Clear cell renal cell carcinoma containing a net of thin periostin positive fibres in the stroma.

Kidney- Periostin positive material in the stroma of an oncocytoma.

Kidney- Some periostin positive material occurs in the stroma of a papillary renal cell carcinoma.

Oral cavity- Abundant periostin positive material in the stroma of a squamous cell carcinoma.

Oral cavity- Periostin is lacking in a squamous cell carcinoma.

Oral cavity- Squamous cell carcinoma containing abundant periostin in the stroma.

Ovary- Only limited periostin immunostaining in the stroma of a serous high-grade carcinoma.

Pharynx- Periostin is abundant at the invasive margin of a squamous cell carcinoma.

Prostate- Adenocarcinoma (Gleason 3+3=6) lacking any periostin immunostaining.

Prostate- Adenocarcinoma (Gleason 3+3=6) showing focal periostin immunostaining of the stroma.

Thyroid- Periostin immunostaining is absent in a papillary carcinoma.

Thyroid- Periostin positive fibres surrounding tumor cell nests of a follicular carcinoma.

Urinary bladder- Muscle-invasive urothelial carcinoma containing a significant quantity of periosin positive material in the stroma.

Urinary bladder- Periostin immunostaining is absent in a non-invasive papillary urothelial carcinoma (pTa).

Uterus – Endometroid endometrium carcinoma containing abundant periostin in the stroma. Epithelial periostin staining could reflect a “contamination artifact” caused by the very high levels of periostin in the surrounding stroma

Uterus- Moderate intensity periostin immunostaining of the stroma of a serous endometrium carcinoma.

Uterus- Some periostin positive material in the stroma of an endometroid endometrium carcinoma.

Uterus, cervix- Periostin immunostaining occurs in the stroma of a squamous cell carcinoma.

Vagina- Intense periostin immunostaining in the stroma of a squamous cell carcinoma.

Vulva- Intense stromal periostin immunostaining in a squamous cell carcinoma.