Pituitary Disease Specialist in Guatemala City
The pituitary controls every hormone. When it fails, the impact is total.
The pituitary gland is the conductor of the endocrine system. A pituitary tumor or dysfunction can simultaneously affect the thyroid, adrenal glands, gonads, growth, and metabolism.
When should you see an endocrinologist?
A pituitary tumor or adenoma was found on an MRI
You have elevated prolactin with galactorrhea, menstrual irregularities, or infertility
You have noticed changes in your hands, feet, or facial features as an adult
You have a deficiency of multiple pituitary hormones
You have persistent headaches with visual disturbances
You were diagnosed with acromegaly or suspect you may have it
⚡ Consultations Monday through Saturday | By appointment only
10–15%
of the population has pituitary microadenomas — most without knowing it
10 years
is the average diagnostic delay for acromegaly
Prolactin
the most frequently altered pituitary hormone in young adults
95%
of pituitary adenomas are benign — but require specialized management
The pituitary: a gland the size of a pea that controls the entire hormonal system.
The pituitary gland produces and regulates the hormones that control the thyroid (TSH), adrenal glands (ACTH), gonads (LH, FSH), growth (GH), and lactation (prolactin). A pituitary adenoma — a benign tumor — can disrupt one or several of these functions simultaneously.
Pituitary diseases are uncommon but high-impact. The problem is that their symptoms are nonspecific — fatigue, weight changes, menstrual irregularities, erectile dysfunction — and are attributed to other causes for years. Diagnosis requires clinical suspicion, specific hormonal tests, and MRI imaging.
“Acromegaly changes facial features so gradually that neither the patient nor their family notices — until someone sees a photo from 10 years ago.”—Dra. Ma. Eugenia Penados
Pituitary symptoms: the cascade effect.
Symptoms of pituitary diseases depend on which hormone is affected — whether there is excess (functioning tumor) or deficiency (compression of healthy tissue). They can be very specific or completely nonspecific.
Galactorrhea
Milk production outside of pregnancy or breastfeeding — the cardinal symptom of hyperprolactinemia in both women and men.
Menstrual irregularities
Irregular cycles or amenorrhea — frequently caused by hyperprolactinemia inhibiting ovulation.
Changes in hands, feet, and face
Growth of hands, feet, and facial features in adulthood — the classic sign of acromegaly due to excess growth hormone.
Headache and visual disturbances
A large pituitary tumor (macroadenoma) compressing the optic chiasm — can cause peripheral vision loss.
Fatigue and multiple hormonal deficiency
Hypopituitarism — deficiency of multiple hormones due to compression of healthy pituitary tissue. May include hypothyroidism, adrenal insufficiency, and sex hormone deficiency.
Sexual dysfunction
Reduced libido, erectile dysfunction in men, or decreased lubrication in women — may indicate gonadotropin deficiency or hyperprolactinemia.
Carpal tunnel syndrome
Common in acromegaly due to soft tissue growth that compresses the median nerve at the wrist.
Polyuria and polydipsia
Excessive urine production and intense thirst — may indicate diabetes insipidus due to antidiuretic hormone (ADH) deficiency.
Do you identify with any of these symptoms?
A one-hour initial consultation is all it takes to begin your evaluation and, when needed, reach a clear diagnosis
The main pituitary diseases
Each pituitary disease has a different pathophysiology, clinical presentation, and management. Classification depends on whether the tumor produces excess hormones, compresses healthy tissue causing deficiency, or both.
Hyperprolactinemia and Prolactinoma
Prolactinoma is the most common pituitary adenoma. It produces excess prolactin, causing galactorrhea, menstrual irregularities, and infertility. It responds excellently to pharmacological treatment with dopamine agonists.
Acromegaly
Excess growth hormone from a pituitary adenoma. Changes are so gradual that diagnosis averages a 10-year delay. Associated with diabetes, hypertension, sleep apnea, and increased cardiovascular risk.
Hypopituitarism
Deficiency of one or more pituitary hormones due to compression of healthy tissue. May include central hypothyroidism, central adrenal insufficiency, gonadotropin deficiency, and GH deficiency. Each axis is evaluated and treated separately.
Non-Functioning Pituitary Adenoma
A pituitary tumor that does not produce excess hormones. The concern is compression of normal pituitary tissue and the optic chiasm. Requires MRI follow-up and visual field evaluation.
Pituitary adenomas are classified by size (microadenoma < 10 mm, macroadenoma ≥ 10 mm) and by function (functioning if they produce excess hormones, non-functioning if they only compress). Management varies completely based on this classification. Pituitary MRI with gadolinium and 2–3 mm high-resolution cuts is the imaging study of choice. A standard brain MRI may not detect microadenomas.
How pituitary diseases are diagnosed during your consultation
Pituitary diagnosis is a stepwise process: first confirm hormonal excess or deficiency, then imaging, then impact assessment. At Dr. Penados' consultation, the complete protocol is designed from the very first hour.
Pituitary medical history
Current symptoms, duration, physical changes, medications (antipsychotics can elevate prolactin), history of head trauma, prior surgeries, or radiation therapy.
Targeted physical examination
Assessment of acromegalic features, basic visual fields, galactorrhea, signs of multiple hormonal deficiency, height, and physical characteristics based on clinical suspicion.
Pituitary hormonal panel
Prolactin, IGF-1 (GH marker), cortisol and ACTH, thyroid panel (TSH + free T4), LH, FSH, testosterone or estradiol — based on the suspected axis.
Specific functional tests
Glucose-suppressed GH test for acromegaly. Dynamic adrenal axis evaluation when hypopituitarism is suspected.
Pituitary MRI
Sellar MRI with gadolinium and high-resolution cuts (2–3 mm). Different from a standard brain MRI — must be ordered with a specific pituitary protocol.
Impact assessment and coordination
Formal visual fields if a macroadenoma is present. Bone densitometry if gonadotropin or GH deficiency is present. Coordination with neurosurgery when surgery is indicated.
Why see Dr. Penados for pituitary diseases?
Training at a referral center for complex cases
The subspecialty at Hospital José E. González at UANL — one of the most important referral centers in Latin America — provided direct exposure to complex pituitary cases that are rarely seen in general practice.
Rigorous diagnostic protocol from the first consultation
Pituitary diseases require specific hormonal tests, imaging with the correct protocol, and impact assessment. Dr. Penados designs the complete protocol from the very first hour — no unnecessary tests, no skipped steps.
Coordinated multidisciplinary management
Pituitary tumors requiring surgery are coordinated with neurosurgery. Those affecting vision are coordinated with ophthalmology. Dr. Penados maintains the endocrinological coordination role throughout the entire process.
Differential diagnosis — high prolactin is not always a prolactinoma
Prolactin can be elevated by medications, hypothyroidism, stress, or macroprolactinemia. Rigorous differential diagnosis avoids unnecessary treatments and ensures the right treatment is given.
Training at a referral center for complex cases
The subspecialty at Hospital José E. González at UANL — one of the most important referral centers in Latin America — provided direct exposure to complex pituitary cases that are rarely seen in general practice.
Rigorous diagnostic protocol from the first consultation
Pituitary diseases require specific hormonal tests, imaging with the correct protocol, and impact assessment. Dr. Penados designs the complete protocol from the very first hour — no unnecessary tests, no skipped steps.
Coordinated multidisciplinary management
Pituitary tumors requiring surgery are coordinated with neurosurgery. Those affecting vision are coordinated with ophthalmology. Dr. Penados maintains the endocrinological coordination role throughout the entire process.
Differential diagnosis — high prolactin is not always a prolactinoma
Prolactin can be elevated by medications, hypothyroidism, stress, or macroprolactinemia. Rigorous differential diagnosis avoids unnecessary treatments and ensures the right treatment is given.
Ready to receive specialized endocrinological care?
Experience the difference of comprehensive, personalized, evidence-based treatment
Specialized Endocrinology in Guatemala
Clínica de Endocrinología, Metabolismo y Medicina Interna, Dra. Ma. Eugenia Penados Ovalle
6a avenida 4-01 zona 10, Edificio Medika 10, Nivel 3 (N3) Clínica 307Modern practice in the heart of Guatemala City
Office Hours
Monday, Tuesday, Thursday from 9:00 AM to 4:00 PM Friday from 9:00 AM to 1:00 PM Saturday from 8:00 AM to 12:00 PM
Emergency Care
Dr. Penados does not treat emergencies. For medical urgencies, please go to the emergency department of a hospital.
Coverage Areas
Guatemala City
- • Zone 10, 14, 15
- • Zone 9, 13, 16
- • Highway to El Salvador
Metropolitan Area
- • Mixco
- • Villa Nueva
- • Santa Catarina Pinula
- • San Cristóbal
Nationwide Coverage
- • All departments of Guatemala
- • Patients traveling from across the country
- • Periodic visits to Petén (approx. every 6 weeks)
Common questions, clear answers
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