Bryostatin 1 Plus Paclitaxel in Treating Patients With Locally Advanced or Metastatic Esophageal Cancer or Stomach Cancer

DISEASE CHARACTERISTICS:

* Histologically confirmed squamous cell carcinoma or adenocarcinoma of the esophagus or carcinoma of the gastroesophageal (GE) junction

  * If tumor extends below GE junction into the proximal stomach, 50% of the tumor must involve the esophagus or GE junction
  * No gastric cancer with only a minor involvement of GE junction or distal esophagus
* Locally advanced and considered surgically unresectable or metastatic
* Measurable disease

  * Accurately measured in at least 1 dimension as at least 20 mm with conventional techniques or at least 10 mm with spiral CT scan
  * No truly nonmeasurable lesions only:

    * Bone lesions
    * Leptomeningeal disease
    * Ascites
    * Pleural/pericardial effusions
    * Inflammatory breast disease
    * Lymphangitis cutis/pulmonis
    * Abdominal masses not confirmed and followed by imaging techniques
    * Cystic lesions
* No brain metastases

PATIENT CHARACTERISTICS:

Age:

* 18 and over

Performance status:

* Karnofsky 70-100%

Life expectancy:

* Not specified

Hematopoietic:

* Granulocyte count at least 1,500/mm\^3
* Platelet count at least 150,000/mm\^3

Hepatic:

* Bilirubin no greater than 1.5 mg/dL

Renal:

* Creatinine no greater than 1.5 mg/dL

Cardiovascular:

* No history of active angina
* No myocardial infarction within the past 6 months
* No history of significant ventricular arrhythmia requiring medication with antiarrhythmics
* Well-controlled atrial fibrillation on standard management allowed

Pulmonary:

* DLCO at least 60%

Other:

* Not pregnant or nursing
* Negative pregnancy test
* Fertile patients must use effective contraception during and for 2 months after study participation
* No preexisting neurotoxicity of grade 3 or greater
* No serious concurrent infection or nonmalignant medical illness that is uncontrolled or whose control may be jeopardized by complications of study therapy
* No concurrent psychiatric disorders that would preclude study compliance
* No other active malignancy within the past 5 years except:

  * Nonmelanoma skin cancer
  * Carcinoma in situ of the cervix
  * History of T1a or b prostate cancer (detected incidentally at transurethral resection of prostate \[TURP\] and comprising less than 5% of resected tissue) provided prostate-specific antigen remained normal since TURP removal
* HIV negative
* No other concurrent medical condition that would preclude study therapy

PRIOR CONCURRENT THERAPY:

Biologic therapy:

* No concurrent immunotherapy

Chemotherapy:

* Recovered from prior chemotherapy
* No more than 1 prior neoadjuvant or adjuvant regimen for esophageal cancer
* No prior taxanes for esophageal cancer
* No prior bryostatin 1 for esophageal cancer
* No other concurrent chemotherapy

Endocrine therapy:

* Not specified

Radiotherapy:

* Prior radiotherapy allowed provided recent evidence of disease progression if indicator lesion is within prior radiation field
* Recovered from prior radiotherapy
* No concurrent radiotherapy

Surgery:

* Not specified