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  • Title: Intrahepatic extramedullary hematopoietic tumor mimicking metastatic carcinoma from a colonic primary.
    Author: Tamiolakis D, Venizelos J, Prassopoulos P, Simopoulos S, Bolioti S, Tsiapali M, Papadopoulos N.
    Journal: Onkologie; 2004 Feb; 27(1):65-7. PubMed ID: 15007251.
    Abstract:
    BACKGROUND: Extramedullary hematopoiesis (EMH) is associated with a number of diseases in which the normal function of the bone marrow is disturbed. While organs with hemopoietic capacity like the liver and spleen are most commonly involved, EMH has also occasionally been found in other organs like the adrenal gland, lymph nodes, breast, thymus, small bowel and central nervous system. However, presentation of a myeloproliferative disorder, such as EMH in these organs is a rare event. CASE REPORT: We report clinical and fine-needle aspiration (FNA) findings in a patient who presented with intrahepatic EMH which mimicked metastatic carcinoma from a colonic primary. RESULTS: Ultrasound-guided FNA of the intrahepatic mass revealed megakaryocytes and myelocytes thus establishing the diagnosis of EMH. CONCLUSIONS: EMH is an unusual condition that can mimic other solid masses of the liver. Because radiologic findings are not specific, EMH should be considered in the differential diagnosis, especially in patients with a myeloproliferative disorder. FNA and subsequent cytopathological interpretation of the aspirates enables avoidance of unnecessary potentially hazardous surgery.
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