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Pathology Neoplasia ba052f7f

Which of the following is HMB45 negative?

A
Melanoma
B
Angiomyolipoma
C
Tendon clear cell sarcoma
D
Juxtaglomerular tumor
High-Yield Explanation
D i.e. Juxtaglomerular tumorRef: Dab Immunohistochemistry Basics, HMB45Explanation:HMB 45: Human Melanoma Black: Positive staining is seen in:Melanoma (85-90%, see exceptions under negative staining).Angiomyolipoma.Clear cell sarcoma of soft tissue.Clear cell "sugar" tumor.Epithelioid sarcoma (occasional).Kidney: t(6;11)(p21;q12) renal cell carcinoma.Lymphangioleiomyomatosis (also stains non-proliferative cells).Melanocytosis.PEComa.Pheochromocytoma.Pigmented neural tumors (some), including some nerve sheath tumors, some neurofibromas pigmented neuroectodermal tumor of infancy.Tuberous sclerosis complex components.

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