Neuroendocrine neoplasms

Neuroendocrine carcinoma 

Carcinoid of small intestine

Trabecular and reticular pattern; not exactly insular

Slight insular pattern seen

Pancreas

Chromogranin

Vague 'cell balls' separated by capillaries

Lung

TTF1 - absent (i.e. not endodermal, unlike lung)

Synaptophysin

Chromogranin

Chromogranin 

Meningioma

Rhabdoid meningioma

More or less resembling rhabdomyo(skeletal muscle)-blasts

Benign breast lesions

Fibroadenoma

Pericanalicular fibroadenoma

Nipple adenoma

With squamous metaplasia

Microglandular adenosis

Rhabdomyosarcoma

Botryoid ('grape like' on gross ) rhabdomyosarcoma

Lymphomas

Anaplastic large cell lymphoma

Note embryoid ('hallmark') cells

Lymphoplasmacytic lymphoma of marrow