Age18 Years+
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)
DISEASE CHARACTERISTICS:
* Histologically or cytologically confirmed colorectal adenocarcinoma
* Metastatic or locally advanced disease
* Not amenable to curative therapy
* Documentation of disease progression within the past 6 months
* Previously treated with fluoropyrimidine- and irinotecan-based chemotherapy (including capecitabine) administered either concurrently (no more than 2 regimens) or sequentially (no more than 3 regimens) for advanced disease
* At least 1 unidimensionally measurable lesion
* At least 20 mm by conventional techniques OR at least 10 mm by spiral CT scan
* No known brain metastases
PATIENT CHARACTERISTICS:
Age:
* 18 and over
Performance status:
* ECOG 0-2 OR
* Karnofsky 60-100%
Life expectancy:
* More than 12 weeks
Hematopoietic:
* Absolute neutrophil count at least 1,500/mm\^3
* Platelet count at least 100,000/mm\^3
Hepatic:
* Bilirubin no greater than 1.5 times upper limit of normal (ULN)
* AST/ALT no greater than 3 times ULN (5 times ULN if liver metastasis present)
Renal:
* Creatinine no greater than 1.5 times ULN OR
* Creatinine clearance at least 60 mL/min
Cardiovascular:
* No symptomatic congestive heart failure
* No unstable angina pectoris
* No cardiac arrhythmia
Ophthalmic:
* No significant ophthalmic conditions, including:
* Severe dry-eye syndrome
* Keratoconjunctivitis sicca
* Sjogren's syndrome
* Severe-exposure keratopathy
* Disorders that may increase the risk for epithelium-related complications (e.g., bullous keratopathy, aniridia, severe chemical burns, or neutrophilic keratitis)
Other:
* Able to take oral gefitinib
* No other uncontrolled concurrent illness
* No ongoing or active infection
* No psychiatric illness or social situation that would preclude study participation
* No prior gastrointestinal disorders (e.g., malabsorption syndrome)
* No prior allergic reactions attributed to compounds of similar chemical or biological composition to gefitinib
* No other prior malignancy except carcinoma in situ of the cervix, nonmelanoma skin cancer, or other cancer from which the patient has been free of evident disease for more than 5 years and/or has less than a 20-30% estimated likelihood of recurrence
* Not pregnant or nursing
* Negative pregnancy test
* Fertile patients must use effective contraception
PRIOR CONCURRENT THERAPY:
Biologic therapy:
* Not specified
Chemotherapy:
* See Disease Characteristics
* At least 30 days since prior chemotherapy and recovered
Endocrine therapy:
* Not specified
Radiotherapy:
* Not specified
Surgery:
* No prior gastric resection
Other:
* No other prior therapy for advanced disease
* No concurrent combination antiretroviral therapy for HIV-positive patients
* No other concurrent investigational or commercial agents or therapies for the malignancy