Appendix of the upper entero - respiratory tract

Where else would you find squamous epithelium directly overlying lymphoid follicles?

New set of slides 2013

A few good ones I have managed to seep apart from the mess in January 2013. A long list at once, please be patient.

Basal cell adenoma of parotid

Bronchoalveolar carcinoma 

Butterflies on a fence

Giant cell tumor of bone. 

The giant cells should be numerous and have many nuclei (any criteria?)

 Intradermal nevus

Refractory cytopenia - megakaryocyte dysplasia

Megakaryocyte multinucleation. Multinucleation, not multilobation, is dysplasia in megakarycytes.

 

Sarcoidosis of liver

Hard luck finding an asteroid body.

 Small cell / basaloid SCC - cervix. Can not exactly typify.

 

Dediff chondrosarcoma

However, I am split between mesenchymal and dediff. The transition seems to be sudden enough.

Anaplastic astrocytoma (WHO III)

Which essentially means mitosis.

Basal cell carcinoma.

Ductal carcinoma breast

Carcinoid 

Well differentiated neuroendocrine neoplasm WHO I. Found in a Whipple specimen. Grossly very difficult to tell whether arising from pancreas or duodenum.

Chromogranin A on the same

Fibrous dysplasia skull

Chinese letters.

Juvenile rectal polyp

Cribriform even on gross.

Prostate cancer

Possibly gleason 4

Thalassemic liver

Lots of iron.

Metastatic melanoma lymph node

Phyllodes tumor

Pituitary adenoma

Prostate cancer -  perineural invasion

All around the nerve

Sarcoidosis lymph node

Inverted sinonasal papilloma

Thalassemic spleen

Atrophic testis

Thyroid - hurthle cell adenoma

Intermediate trophoblast

PAS stain of colonic mucosa

Apoptotic cell

Apocrine carcinoma breast

Prostate cancer perineurial invasion

Clear cell sarcoma kidney

DCIS cribriform

Ductal hyperplasia breast

Medullary carcinoma thyroid

Langerhans cell histiocytosis

Nodular sclerosis Hodgkin lymphoma

Villos adenoma

Wilms tumor