학슬풍 鶴膝風

Crane-knee arthritis disorder

Where they diverge

Traditional concepts do not map one-to-one onto modern diagnoses. Read the divergence note first.

The traditional concept is broader: defined by the appearance of a swollen knee on a wasted limb, it takes in knee osteoarthritis and polyosteoarthritis among other conditions. Conversely it does not carry the joint-site subdivision, imaging or laboratory findings that ICD-11 uses, and cannot distinguish causes needing immediate intervention such as septic or tuberculous arthritis.

Strong correspondencebasis: literatureauto-generated · not individually reviewed

Research confidence: medium. The full assessment, in Korean, is in docs/PATTERN_RESEARCH_KCD_DISEASES.md.
The modern correspondences come from literature research, not from an official KCD or KTKP mapping, so the highest mapping confidence is not assigned.
Full evidence and citations are in docs/PATTERN_RESEARCH_KCD_DISEASES.md.
KCD does not carry the Donguibogam volume, so it is left blank here. It needs checking against the original text.
6 question(s) the research could not settle — see the research document.

Signs that need immediate medical assessment

Chronic knee swelling must be assessed for infection — septic arthritis or tuberculous osteoarticular disease — before being handled under this traditional category when it (1) affects only one knee, (2) comes with fever, night pain, weight loss or night sweats, or (3) occurs in someone with a history of or contact with tuberculosis, or with immunosuppression. Margaretten ME, Kohlwes J, Moore D, Bent S. Does this adult patient have septic arthritis? JAMA 2007;297(13):1478-1488 (PMID 17405973, doi:10.1001/jama.297.13.1478) — about 10% of patients with acute monoarthritis have septic arthritis, the sensitivity of fever is only 57% so its absence cannot rule it out, and confirmation requires synovial fluid analysis after aspiration (white cell count above 100,000/µL, likelihood ratio 28.0). For tuberculous arthritis, see the WHO ICD-11 MMS 2025-01 definition of 1B12.40 (Tuberculosis of bones or joints): it presents with bone pain, joint inflammation, loss of movement or sensation in the affected bone or joint, and weak bones prone to fracture, and confirmation is identification of the tubercle bacillus in a biopsy specimen from the affected site. Using the classical description of this entity — that it does not produce fever and that the skin colour does not change — to exclude infection is dangerous. In children and adolescents, swelling of a single joint lasting six weeks or more warrants paediatric rheumatology or orthopaedic assessment to distinguish juvenile idiopathic arthritis, infection and bone tumour.

Tradition · what the text describes

Traditional pattern

학슬풍 鶴膝風

The Donguibogam volume for this entry is unverified — KCD does not carry it.

Bridge · linked via official codes

Official codes

KCD U87.2 학슬풍(鶴膝風) · Korean Medicine disease name

Modern · documented evidence

Modern diagnosis

FA01 Osteoarthritis of knee
FA05 Polyosteoarthritis
FB50.Z Bursitis, unspecifiedRice body bursitis of the knee joint

Diagnosis names are WHO ICD-11’s own wording. Any second line is our description, not an ICD-11 label.

Related formulas

Formulas that the KTKP record lists as indicated for this entry. The herbs above are linked through them.

경험이방음

학슬풍 鶴膝風

Where they diverge

Tradition · what the text describes

Traditional pattern

Bridge · linked via official codes

Official codes

Modern · documented evidence

Modern diagnosis

Related herbs

Related formulas

Sources