NLM Classification Schedule QZ

QS QT QU QV QW QX QY QZ W WA WB WC WD WE WF WG WH WI WJ WK WL WM WN WO WP WQ WR WS WT WU WV WW WX WY WZ

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QZ Pathology
	QZ 1-39 Reference Works. General Works
	QZ 40-109 Pathogenesis. Etiology
	QZ 140-190 Manifestations of Disease
	QZ 200-380 Neoplasms. Cysts
	Reference Works. General Works

QZ 1	Societies (Cutter from name of society) (Used for both monographs and serials)
	Includes ephemeral membership lists issued serially or separately. Classify substantial lists with directories. Classify annual reports, journals, etc., in W1.

QZ 4	General works
	Classify material on comparative pathology in QZ 33.
	Collected works (General)
QZ 5	By several authors
QZ 7	By individual authors

QZ 9	Addresses. Essays. Lectures (General)

QZ 11	History (Table G)
QZ 11.1	General coverage (Not Table G)

QZ 11.5	Paleopathology

QZ 13	Dictionaries. Encyclopedias (Used for both monographs and serials)

QZ 15	Classification. Terminology (Used for both monographs and serials)

QZ 16	Tables. Statistics (Used for both monographs and serials)

QZ 17	Atlases. Pictorial works
	Classify here atlases on tissue pathology in disease.

QZ 18	Education
	Classify here works about education.

QZ 18.2	Educational materials (Used for both monographs and serials)
	Classify here educational materials, e.g., outlines, questions and answers, programmed instruction, catalogs, computer-assisted instruction, etc., regardless of format. Classify textbooks, regardless of format, by subject.

QZ 19	Schools, departments, and faculties of pathology (Used for both monographs and serials)

QZ 20.5	Research (General)
	Classify material on cancer research in QZ 206.

QZ 21	Pathology as a profession. Ethics. Peer review

QZ 22	Directories (Table G) (Used for both monographs and serials)
QZ 22.1	General coverage (Not Table G) (Used for both monographs and serials)
	Laboratories, institutes, etc. Cancer hospitals
QZ 23	Collective
QZ 24	Individual (Cutter from name of institution)

QZ 25	Laboratory manuals. Technique

QZ 26	Equipment and supplies (Used for both monographs and serials)
	Classify catalogs here.

QZ 26.5	Informatics. Automatic data processing. Computers (General)
	Classify works on use for special subjects by subject.
	Museums, exhibitions, etc.
QZ 27	Collective
QZ 28	Individual (Cutter from name of institution)

QZ 32	Laws (Table G) (Used for both monographs and serials)
QZ 32.1	General coverage (Not Table G) (Used for both monographs and serials)
QZ 32.3	Discussion of law (Table G) (Used for both monographs and serials)
QZ 32.4	General coverage (Not Table G) (Used for both monographs and serials)

QZ 33	Comparative pathology

QZ 35	Postmortem examination
	Classify works on examination of dead bodies for medicolegal purposes in W 800-867.

QZ 39	Handbooks. Resource guides (Used for both monographs and serials)
	Pathogenesis. Etiology

QZ 40	Pathogenesis. Etiology
	Classify here works on causative factors and development. Classify works on diagnosis, therapy, etc., of the resultant disease with the disease or system.
QZ 42	Iatrogenic disease (General). Adverse effects of drugs. Medication errors
	Classify works with emphasis on drug action in QV 38.
QZ 45	Developmental defects
QZ 50	Heredity. Medical genetics
	Classify works on pharmacogenetics in QV 38.
QZ 52	Genetic techniques
QZ 53	Age factors. Sex factors
	Classify works on age factors or sex factors relating to a particular disease, with the disease.
QZ 55	Trauma (Physical)
QZ 57	Physical agents (e.g., Light. Vibration)
	Cf. QT 162 for physiological effects.
QZ 59	Chemical agents
QZ 65	Bacteria. Fungi. Viruses. Rickettsia (General)
	Classify works on specific organisms in QW regardless of the subject.
QZ 85	Animal parasites
QZ 105	Nutrition disorders
	Cf. WD 100-175 for clinical aspects.
QZ 109	Vitamin deficiencies
	Manifestations of Disease

QZ 140	General manifestations of disease
QZ 150	Local reactions to injury and disease
QZ 160	General reactions to injury and disease. Stress
QZ 170	Circulatory disorders
QZ 180	Degenerative processes. Disorders of metabolism
	Cf. WD 200-226 for clinical aspects.
QZ 190	Local disorders of growth (e.g., Hyperplasia)
	Neoplasms. Cysts

QZ 200	Neoplasms. Cysts (General)
	Classify works on neoplasms by site or tissue if applicable.
QZ 201	Popular works
	Classify here popular works on all aspects of neoplasms.
QZ 202	Etiology. Metastasis. Regression. Invasiveness
QZ 204	Precancerous conditions
QZ 206	Research (General)
	Classify works on specific topics by subject, e.g., on experimental work on the etiology of neoplasms in QZ 202.
QZ 220	Epidemiology (Table G)
QZ 220.1	General coverage (Not Table G)
QZ 241	Diagnosis. Diagnostic methods
QZ 266	Therapy
QZ 267	Drug therapy
QZ 268	Surgical techniques
QZ 269	Radiotherapy
QZ 275	Pediatric oncology. Adolescent oncology (General)
	Classify here all aspects of pediatric and adolescent neoplasms in general; classify works on particular neoplasms with the neoplasm. Classify works on neoplasms by site or tissue if applicable.
	Specific types of neoplasms
	Classify books on neoplasms by site when possible, especially when the emphasis is on dysfunction, symptomatology, and treatment. Emphasis in this section is on the pathology of tissues rather than on organ. Classify works on dental or oral tissue in WU 280.
QZ 310	Embryonal and mixed tumors

[QZ 320]	[This number not used]
	Classify tumors derived from developmental faults in QZ 310.

[QZ 330]	[This number not used]
	Classify tumors derived from fetal membranes in QZ 310.
QZ 340	Connective, muscle, and vascular tissues
QZ 345	Sarcoma
QZ 350	Leukemia. Lymphoma. Hematologic neoplasms
	Cf. WH 250 and WH 525 for clinical aspects.
QZ 365	Glandular and epithelial tissue. Carcinoma (General or not elsewhere classified)
QZ 380	Nerve tissue