PubMed Health⌕ Search

PubMed · 2704300

Validating the knowledge base of a therapy planning system.

Abstract

Validation of expert system knowledge bases has proved to be difficult. This paper presents a description of a system called ScriptGen that generates test data for validating the knowledge base of the ONCOCIN cancer therapy planning system. Because of the size and complexity of the ONCOCIN knowledge base, we require tools for automated validation. ScriptGen, which applies techniques developed in testing both traditional software and expert systems, uses a parallel model of the ONCOCIN knowledge base and its own inference engine to generate test cases. We derived the limits of the system from a study that seeded errors into an existing knowledge base.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

M A Shwe, S W Tu, L M Fagan. 1989. Validating the knowledge base of a therapy planning system.. https://pubmed.ncbi.nlm.nih.gov/2704300/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Treatment of metastatic sialoblastoma with chemotherapy and surgery.

Tumors of the salivary gland are very uncommon in children. Sialoblastoma is a rare, aggressive, blastomatous, and potentially malignant congenital tumor. Distant metastases are rare. We present a case of sialoblastoma with lung metastases that developed in a 4-year-old girl adjacent to a congenital nevus in the left cheek. The tumor was inoperable at diagnosis but the largest of the pulmonary metastases was removed surgically. The patient responded well to chemotherapy and underwent surgical excision of the primary tumor, followed by three more courses of chemotherapy.

Antineoplastic Combined Chemotherapy Protocols↗

Long-term remission of children with relapsed and secondary anaplastic large cell non-Hodgkin lymphoma (ALCL) following treatment with pulsed dexamethasone and low dose etoposide.

Anaplastic large cell lymphoma (ALCL) accounts for approximately 15% of childhood NHL. Relapsed ALCL represents a formidable challenge because outcome is poor despite the use of high-dose chemotherapy regimens. We report two patients with relapsed T-type and 0-type ALCL who achieved long-term 3rd and 4th remissions with 4-weekly oral dexamethasone (DEX) and etoposide pulses for 2 years. This regimen also induced and maintained remission in a third patient with Nijmegen breakage syndrome (NBS) with secondary T-type ALCL. These patients demonstrate that low-intensity oral chemotherapy can induce long-term remissions and offer a curative perspective in refractory, relapsed and secondary ALCL.

Antineoplastic Combined Chemotherapy Protocols↗

Stage III cystic partially differentiated nephroblastoma recurring after nephrectomy and chemotherapy.

Cystic partially differentiated nephroblastoma (CPDN) has low malignant potential. We report a 1-year-old with stage III CPDN of the right kidney that recurred following radical nephrectomy and chemotherapy. There was evidence of tumor spillage pre-operatively and intra-operatively. During chemotherapy the disease recurred in the omentum and the peritoneum. Pathology of the recurrent resected cysts revealed a more differentiated biphasic tumor without blastemal elements. It appears that spillage of CPDN in our patient led to dissemination of disease. Chemotherapy failed to prevent recurrence but only mature elements were present following this treatment. The intensity of therapy required to treat CPDN remains undefined.

Antineoplastic Combined Chemotherapy Protocols↗