Primary Aldosteronism: This condition is characterized by the excessive production of aldosterone, leading to hypertension and hypokalemia. However, some cases can present with hyperkalemia due to the aldosterone resistance or the effect of other hormones. The presence of diabetes mellitus type 2 and low TSH (which could be indicative of hyperthyroidism, though typically TSH is low in hyperthyroidism, the combination of symptoms suggests a complex endocrine disorder) makes primary aldosteronism a consideration, especially if there's an element of aldosterone resistance or another underlying mechanism contributing to the hyperkalemia.

Hyperthyroidism: Although low TSH typically indicates hyperthyroidism, which can cause hypertension and potentially affect potassium levels indirectly, the direct link to hyperkalemia is less common. However, the combination of symptoms, including diabetes mellitus type 2, suggests a complex metabolic and endocrine disorder.
Cushing's Syndrome: This condition, caused by excessive cortisol, can lead to hypertension, diabetes mellitus type 2, and potentially affect thyroid function tests. Hyperkalemia can occur in some cases, especially if there's associated renal impairment or another underlying condition affecting potassium levels.
Pheochromocytoma: A rare tumor of the adrenal gland that can cause hypertension, and less commonly, affect potassium levels and glucose metabolism. The low TSH could be incidental or related to another condition, but the combination of symptoms warrants consideration.

Adrenal Crisis or Insufficiency: Although typically associated with hypotension, an adrenal crisis can present with a wide range of symptoms including electrolyte imbalances. It's crucial to consider this diagnosis due to its high mortality rate if left untreated.
Thyroid Storm: A life-threatening complication of untreated or undertreated hyperthyroidism, which can present with hypertension, electrolyte imbalances, and significant metabolic disturbances.

Liddle's Syndrome: A rare genetic disorder characterized by excessive sodium absorption and potassium secretion in the kidneys, leading to hypertension and hypokalemia. However, some variants or associated conditions could potentially present with hyperkalemia.
Apparent Mineralocorticoid Excess (AME): A rare condition where the body has an abnormality in the metabolism of cortisol, leading to an excessive mineralocorticoid effect, which can cause hypertension and electrolyte imbalances, including potentially hyperkalemia in certain contexts.
Familial Hyperaldosteronism Type 1 (Glucocorticoid-Remediable Aldosteronism): A rare form of primary aldosteronism that is responsive to glucocorticoids. It could potentially present with a complex picture including hypertension, electrolyte disturbances, and metabolic syndrome components like diabetes mellitus type 2.