Treatment of Solid Tumors With Intratumoral Hiltonol® (Poly-ICLC)

We hypothesize that this therapeutic in-situ autovaccination strategy is comprised of three
immunomodulatory steps. The first is the innate immune local tumor killing induced by
intratumoral Hiltonol (via NK, TNF, etc). A very close second step is optimal Th1-weighted
priming through the in-situ combination of the poly-ICLC danger signal with the tumor
antigens released in step 1 and further processed and cross-presented by poly-ICLC activated
mDC, etc. The repeated administration of the Hiltonol danger signal IT in the context of the
patient's own tumor antigens and in a way that mimics a natural viral infection may be
critical to this step. Once the system is optimally primed, the third step is targeting and
maintenance of the immune response and its facilitation at remote tumor sites with IM
poly-ICLC through chemokine release, inflammasome activation and other costimulatory factors.

Inclusion Criteria:

- Histologically confirmed diagnosis of melanoma, squamous head and neck cancer,
sarcoma, squamous cell carcinoma of the skin, basal cell skin cancer, or breast cancer

- Sarcoma Patients must be @ least14 yrs of age; all others 18 yrs of age or older.

- Un-resectable disease. Patients with resectable disease may be enrolled after having
refused surgery and documented consultation with a surgeon.

- Disease progressed through @ least 1 systemic therapy or through local irradiation
within the preceding 6 mos.

- Radiologically or visually measurable recurrent or metastatic disease and @ least 10mm
in longest dimension.

- At least 1 accessible primary or metastatic tumor site that can be readily injected IT
with poly-ICLC with or without ultrasound guidance. Lesion can be superficial
cutaneous, subcutaneous or within a readily accessible lymph node & must measure @
least 10mm in longest dimension.

- Tumor site injection cannot have been irradiated within 8 wks of C1D1

- ECOG performance status ≤ 2.

- Normal hematologic, renal & liver function. INR<2 if off of anticoagulation. Patients
on anticoagulation therapy with an INR>2 may be enrolled at the discretion of the
investigator.

- Patients able to provide informed consent.

- Must agree to follow acceptable birth control methods and continue for @ least 2 mos.
after last poly-ICLC dose. Women of childbearing potential must have a (-) pregnancy
test.

Exclusion Criteria:

- Serious concurrent infection or medical illness.

- Bulky intracranial metastatic disease with shift of midline structures or progressive
brain metastasis. Administration of immunotherapy or conventional chemotherapy
treatments for metastatic cancer within 4 wks of C1D1

- Radiation treatments within 4 wks of C1D1

- AIDS defined as a CD4 count < then 200 in the context of HIV sero-positivity or
chronically is taking immunosuppressive medication such as steroids or transplant
related medications.

- Life expectancy of < than 6 mos.