Here is a selection of new images from our free, online textbook:
Bone & joints > Chondrosarcoma (primary, secondary, periosteal)
There is obvious nuclear atypia and pleomorphism but the background is distinctly chondroid.
Contributed by Shadi Qasem, M.D.
Bone marrow neoplastic > Myeloid / lymphoid neoplasms with eosinophilia and gene rearrangement > PCM1-JAK2
Bone marrow clot showing large, abnormal aggregate of early erythroid precursors. Also note dysplastic megakaryocytes (H&E stain, 200x).
Contributed by Zeba N. Singh, M.B.B.S., M.D.
Lymphoma & related disorders > HHV8 related germinotropic lymphoproliferative disorder
Large atypical cells with anaplastic features.
Contributed by Julie Teruya-Feldstein, M.D.
Lymphoma & related disorders > Indolent T lymphoproliferative disease of the GI tract
Majority of T cells in the infiltrate are CD8 positive.
Contributed by Anamarija M. Perry, M.D.
Uterus > Leiomyoma-general > FH deficient leiomyoma
Spindle or epithelioid cells with ovoid nuclei and prominent eosinophilic nucleoli surrounded by perinucleolar halos.
Contributed by Sabrina Croce, M.D., Ph.D.
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