Related to Klinefelter syndrome which also causes increase in LH [1]

PGE2 can cause it by elevating aromatase

Causes of high blood pressure akso related to gyno [2]

Compilation [3].

Common causes

drugs, alcohol, gym, steroids, cirrhosis and ductal carcinoma cancer [4]

Broad differential diagnosis including testicular cancer [5]

I suspect strongyloides is also a common cause, and it probably is a good sign of infection [6]

Elevated LH due to something like strongyloides can cause mammary gland hyperplasia [7] can also cause hair loss [8] and is very similar to PCOS but for males


Related to estrogen and prolactin. Also to meningitis from mycobacterium along with hypogonadism [9]

Mycobacterium tuberculosis of the chest wall [10].

Sternum injury especially with m tuberculosis causes gynecomastia [11].

Estrogen elevated by m tuberculosis [12].

Pasteurella [13]

Tubercular mastitis

Corynebacterium [14] [15]

E coli corynebacterium staphylococcus [16]


Leydig cell tumor causes increased testosterone [17] or estrogen [18]

Pituitary lesion [19] GH [20]

HCG from testicular tumor [21]

Can be a combination of hydrocele that produces some extra estrogen and a liver that can't break down it fast enough. High testosterone might also be a sign [22]


Adenovirus [23]


Newborn gynecomastia likely from elevated homocysteine from low diamine oxidase in the mother from low folic acid [24]

Also gyno is noticed in puberty where boys experience huge increases of dopamine receptors [25]. Homocysteine interacts and blocks dopamine receptors which may cause the gyno.

And yes gyno is caused by prolactin over production due to dopamine receptor blockade [26]. Of course this is due to homocysteine in most cases.

Pernicious anemia

Cobalamin deficiency linked to gyno [27]




Cirrhosis may cause one sided button like lump under nipple [29]. Cirrhosis is linked to low phosphorus [30]


High estrogen causes low phosphorus


May be a connection [31] [32]

Case study with gyno, hyperparathyroid, high blood pressure [33]

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