cualocatl.

Headword: 
cualocatl.
Principal English Translation: 

cancer; or, breast cancer (see Molina); or, jigger fleas (see Sahagún)

Orthographic Variants: 
qualocatl
Alonso de Molina: 

qualocatl. cancer, o zaratan.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 84v. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

Qualocatl: çan mochipa tocujtlapan in motlalia = Jigger fleas [which] always settle on the back (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 10 -- The People, No. 14, Part 11, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1961), 152.

themes: 
Health, Sickness, Wellness, Medicine