Zusammenfassung
Primäre neuroendokrine Karzinome der Leber sind seltene Neoplasien. Das Spektrum reicht von hoch differenzierten primär hepatischen Karzinoidtumoren (PHCT) bis zu undifferenzierten primären hepatischen kleinzelligen Karzinomen (PHSCC). Unsere erste Patientin mit einem PHCT beobachten wir bereits über einen Zeitraum von 32 Jahren. Während dieser Zeit kam es 4-mal zu einem Rezidiv und zu hämatogenen Metastasen mit gleich bleibendem histologischen und immunhistochemischen Muster. Unsere zweite Patientin erkrankte an einem kleinzelligen Karzinom der Leber ohne hepatozelluläre oder cholangiozelluläre Differenzierungsmerkmale. Es bestanden keine Risikofaktoren für ein hepatozelluläres Karzinom. Selbst eine extensive prä- und postoperative Diagnostik konnte keinen extrahepatischen Primärherd identifizieren. Immunhistochemisch erwies sich der Tumor als negativ für Hepar-1, AFP, TTF1, CDX2, exprimierte punktförmig die Keratine 8, 18 und 20, weiterhin CD56. Nach der Diagnose eines neuroendokrinen PHSCC wurde der Tumor ohne nachweisbare tumorreduktive Wirkung neoadjuvant chemotherapiert und anschließend komplett exstirpiert. 18 Monate nach der Operation ist die Patientin beschwerdefrei ohne Anhalt für ein Rezidiv oder Metastasen.
PHCT und PHSCC müssen klar von hepatozellulären und cholangiozellulären Karzinomen unterschieden werden. Auch der Ausschluss eines extrahepatischen Primärherds ist essenziell und erfordert eine sorgfältige synoptische Analyse der klinischen, radiologischen und pathologischen Befunde. Die chirurgische Entfernung ist Therapie der Wahl.
Abstract
Primary hepatic neuroendocrine tumors are rare neoplasms. While primary hepatic carcinoid tumors (PHCT) are well-differentiated tumors, primary hepatic small-cell carcinomas (PHSCC) represent the poorly differentiated end of the spectrum of neuroendocrine carcinomas. The first patient, suffering from PHCT, has had a follow-up for 32 years and is still alive. Within this time, the tumor relapsed 4 times with unchanged histology and immunohistochemistry features. The second patient suffered from small-cell carcinoma of the liver. There were no risk factors for a hepatocellular carcinoma. An extensive preoperative and postoperative diagnostic investigation could rule out an extrahepatic primary site. Immunohistochemically the tumor was negative for Hepar-1, AFP, TTF1 and CDX2 but reacted positively with CD56 and sporadically with the keratins 8, 18 and 20. A neuroendocrine PHSCC was diagnosed. After neoadjuvant cytostatic treatment the carcinoma was completely extirpated and 18 months after treatment the patient is healthy.
PHCT and PHSCC have to be clearly separated from hepatocellular and cholangiocellular carcinomas. Exclusion of an extrahepatic primary site requires an accurate and synoptic analysis of clinical, radiologic and pathologic findings. Surgical resection is the treatment of choice.
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Balta, Z., Sauerbruch, T., Hirner, A. et al. Primäre neuroendokrine Karzinome der Leber. Pathologe 29, 53–60 (2008). https://doi.org/10.1007/s00292-007-0957-z
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DOI: https://doi.org/10.1007/s00292-007-0957-z
Schlüsselwörter
- Primärer hepatischer Karzinoidtumor (PHCT)
- Primäres hepatisches kleinzelliges Karzinom (PHSCC)
- Neuroendokrine Tumoren
- Immunhistochemie