“…Hematogenous spread is rare. Rare cases of this blood-borne metastasis, including bone, skin, fallopian tube, muscle, kidney, and gastrointestinal tract, have been described (10)(11)(12)(13)(14)(15). The differential diagnosis of metastatic appendix tumors includes neuroendocrine tumors, low and high-grade appendiceal mucinous neoplasms, mucinous adenocarcinoma, colonic-type adenocarcinoma, goblet cell carcinoma, mesenchymal tumors (GIST, desmoid, leiomyoma, leiomyosarcoma), non-carcinoid tumors (ganglioneuroma, pheochromocytoma, paraganglioma), sarcomas (HIV-associated Kaposi sarcoma, desmoplastic small round cell tumors), neuroectodermal and nerve sheath tumors (schwannoma, neurofibroma), lymphomas, and metastasis (2).…”