Hydatid disease (Echinococcosis) may show local or systemic findings suspicious for a malignancy.


Reasons why hydatid disease may be mistaken for a malignancy:

(1) An exposure to echinococcosis is not recognized.

(2) The physician is unfamiliar with echinococcosis.

(3) The lesions occur in an organ (lung, ovary, etc) that commonly shows tumors AND/OR the patient has risk factors for tumor.

(4) The patient presents with disseminated disease (to brain, bone, subcutaneous tissue, etc) mimicking metastatic cancer.

(5) Positive PET scan.


Reasons why a malignant tumor may be mistaken for hydatid disease:

(1) The patient is from an endemic region or is known to have echinococcosis.


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