Давайте, но не искажая цвета!

Спасибо за подсказку, я надеюсь все правильно сделала. Почти А.Ю.Д.

Если исключено поступление красящих мочу веществ с пищей, лекарствами и т.д., то болезней приводящих к такой окраске немного: порфирия (как я понимаю её исключили), алкаптонурия - у некоторых пациентов моча бывает краснокоричневая, а не чёрная. Поэтому я думаю алкаптонурию нужно исключить, тем более что она ничем иным, кроме изменения цвета мочи, в детстве не проявляется. Ниже текст про алкаптонурию, к сожалению не имею русского текста.

Alkaptonuria
Alkaptonuria was one of the six original inborn errors of
metabolism described by Garrod in 1902. The name alkaptonuria
was derived from the observation that urine from
patients with this condition darkened after becoming alkaline
from standing at room temperature. Therefore, the term
“alkali lover,” or alkaptonuria, was adopted. This metabolic
defect is actually the third major one in the phenylalaninetyrosine
pathway and occurs from failure to inherit the gene
to produce the enzyme homogentisic acid oxidase. Without
this enzyme, the phenylalanine-tyrosine pathway cannot proceed
to completion, and homogentisic acid accumulates in
the blood, tissues, and urine. This condition does not usually
manifest itself clinically in early childhood, but observations
of brown-stained or black-stained cloth diapers and reddishstained
disposable diapers have been reported.7 In later life,
brown pigment becomes deposited in the body tissues (particularly
noticeable in the ears). Deposits in the cartilage eventually
lead to arthritis. A high percentage of persons with
alkaptonuria develop liver and cardiac disorders.5
Homogentisic acid reacts in several of the routinely used
screening tests for metabolic disorders, including the ferric
chloride test, in which a transient deep blue color is produced
in the tube test. A yellow precipitate is produced in the Clinitest,
indicating the presence of a reducing substance. Another
screening test for urinary homogentisic acid is to add alkali to
freshly voided urine and to observe for darkening of the color;
however, large amounts of ascorbic acid interfere with this
reaction. The addition of silver nitrate and ammonium
hydroxide also produces a black urine. A spectrophotometric
method to obtain quantitative measurements of both urine
and plasma homogentisic acid is available, as are chromatography
procedures. It is important to differentiate between the
presence of homogenistic acid and melanin when urine is
seen that has turned black upon standing.