TABLE 1 Histologic Findings in the Myocardium in Cases of Sudden, Unexpected Death

Age (y)/Sex	Myocyte Necrosis^a	Interstitial Inflammation^b	Perivascular Infiltration^c
21/M	rare	marked	diffuse
47/M	marked	marked	diffuse
24/M	absent	marked	diffuse
43/M	rare	rare	focal
2/M	absent	rare	focal
6/M	absent	marked	focal
37/F	marked	marked	diffuse
62/F	absent	rare	focal
60/M	rare	rare	focal
52/F	marked	marked	focal
67/M	rare	marked	diffuse
44/F	rare	minimal	focal
25/F	absent	rare	focal

M, male; F, female.
^aMyocyte necrosis: absent, rare: 1 to 5 degenerated myocytes per tissue section; moderate: 6 to 10 degenerated myocytes per tissue section; marked: >11 necrotic myocytes per tissue section.
^bInterstitial inflammation: absent, minimal: 1 to 3 areas of interstitial infiltrates; marked: ≥4 or more areas of interstitial infiltrates.
^cPerivascular infiltration: absent, focal: 1 to 3 areas of perivascular infiltrates per tissue section; diffuse: ≥4 areas of perivascular infiltrates per tissue section.

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