Acromegaly
Acromegaly is a rare, chronic hormonal disorder that causes major changes in appearance. It results from excess growth hormone (GH) secreted by a benign tumor of the anterior pituitary (somatotropinoma). Too much GH drives the liver and other tissues to pour out insulin-like growth factor 1 (IGF-1), which in turn stimulates widespread overgrowth of the dermis, epidermis and skin appendages. Because the skin and soft-tissue changes usually develop silently for 7–10 years before the condition is diagnosed, dermatologists are important gatekeepers who can spot its telltale skin signs early. At Haute-Derma, we have built a screening pathway that picks up acromegaly from these marker skin findings, combined with specialist treatments to restore and resurface the skin.
How it affects skin cells and metabolism:
- Dermal Overgrowth and Glycosaminoglycan (GAG) Buildup: persistently high serum GH and IGF-1 bind to GHR and IGF-1R receptors on fibroblasts, stimulating them to divide and make more type I and III collagen. IGF-1 also causes abnormal accumulation of glycosaminoglycans (GAGs), mainly hyaluronic acid and chondroitin sulfate, in the dermal interstitium. These GAGs soak up and hold large amounts of water, producing interstitial dermal edema that markedly thickens the skin (pachydermia), carves deep, coarse wrinkles and distorts the soft-tissue contours of the face.
- Enlarged, Overactive Skin Glands: IGF-1 causes sebocytes to multiply and enlarge, leading to widespread excess oil (hyperseborrhea) and visibly enlarged pores. It also acts directly on eccrine and apocrine sweat glands, increasing their size and output, which produces generalized excessive sweating (hyperhidrosis) and strong body odor (bromhidrosis).
- Epidermal Overgrowth and Pigment Changes: IGF-1R signaling, together with the insulin resistance common in acromegaly, stimulates keratinocyte proliferation in the epidermis. This produces soft skin tags (acrochordons) on the neck and armpits, thickened dark velvety plaques in the body folds (acanthosis nigricans) and, in some patients, a scalp folded into ridges that resemble the surface of the brain (cutis verticis gyrata).
Skin Manifestations of Acromegaly
| Clinical Feature | What It Looks Like | Cellular and Molecular Mechanism |
|---|---|---|
| Thick Skin and Coarse Facial Features (Pachydermia) | Thick, coarse facial skin; enlarged lips and nose; deep forehead lines and nasolabial folds; a jutting jaw (prognathism); swollen, enlarged hands and feet (larger ring and shoe size). | GH/IGF-1 drive fibroblasts to make more collagen and to deposit water-binding glycosaminoglycans (GAGs) in the dermis. |
| Heavy Oil and Sweat Production | Constantly shiny facial skin, very large pores, continuous sweating all over the body with a strong odor, and damp, clammy skin. | IGF-1 enlarges sebocytes and increases the size of eccrine/apocrine sweat glands. |
| Skin Tags (Acrochordons) | Crops of soft, stalked, skin-colored or dark brown growths, mostly on the neck, armpits and chest. | IGF-1R stimulates growth of epidermal keratinocytes and dermal fibroblasts in areas exposed to friction. |
| Acanthosis Nigricans | Thickened, darkened, velvety plaques in body folds (neck, armpits, groin, under the breasts). | IGF-1 combined with high blood insulin drives overgrowth of keratinocytes and melanocytes. |
| Cutis Verticis Gyrata | The scalp over the crown and back of the head thickens and folds into parallel ridges running front to back, like the folds of the brain. | Excessive growth of the scalp's dermal connective tissue under long-term GH/IGF-1 stimulation. |
Telling Acromegaly Apart From Other Causes of Skin Thickening
| Acromegaly | Pseudoacromegaly / Pachydermoperiostosis | Pretibial Myxedema (Graves Disease) |
|---|---|---|
| GH and IGF-1: markedly raised | GH and IGF-1: completely normal | GH and IGF-1: completely normal |
| Generalized thickening, most obvious on the face, hands and feet | Thickening mainly of the face, scalp, forearms and lower legs | Thickening confined to the shins (front of the tibia) |
| Jaw enlargement and frontal bone overgrowth | Thickened periosteum (periostosis) of the long bones, clubbed fingers | No long-bone enlargement |
| Sweating/oiliness: very marked, with oily skin and sweating all over | Increased oiliness but no heavy sweating | Dry skin with little sweating |
| Skin tags and acanthosis nigricans: very common (a key clue) | Uncommon | Absent |
Our Approach
At Haute-Derma, patients with signs that suggest acromegaly are assessed through a thorough, whole-person medical pathway:
- Screening for Telltale Clinical Signs:
- Comparing the patient's face today with photos from 5–10 years ago to reveal gradual soft-tissue changes.
- Asking about growth of the hands and feet (having to loosen a watch strap or go up a ring or shoe size).
- Carefully examining associated skin findings: the number of skin tags, acanthosis nigricans in the folds, and excess oil and sweat.
- Biochemical Diagnosis and Pituitary Assessment:
- Serum IGF-1 adjusted for age and sex (the most useful screening test).
- An oral glucose GH suppression test (OGTT-GH): if GH does not fall below 1 µg/L after a 75 g glucose drink, the diagnosis of acromegaly is confirmed.
- Pituitary MRI with sellar reconstruction to determine the size of the tumor (microadenoma or macroadenoma).
- Skin Surface Assessment at Haute-Derma: A detailed skin analysis device measures oil output, pore size, dermal water content and wrinkle structure.
Treatment Options at Haute-Derma
Our management of acromegaly closely combines treatment of the underlying cause with restorative treatment of the skin:
- Treating the Underlying Cause (Together With Endocrinology):
- Patients must have the pituitary tumor removed through the sphenoid sinus (transsphenoidal surgery) or receive medical treatment with somatostatin analogs (octreotide, lanreotide) or a GH receptor antagonist (pegvisomant) to bring GH/IGF-1 back to normal levels.
- Clearing Epidermal Growths and Pigment Changes at Haute-Derma:
- Skin tag removal: superpulsed CO2 laser precisely removes each soft skin tag on the neck and armpits with minimal bleeding, a very low risk of scarring and a quick recovery.
- Improving acanthosis nigricans: gentle chemical peels combined with topical 20% azelaic acid and newer-generation retinoids thin the overgrown stratum corneum and even out the color of the skin folds.
- Resurfacing the Skin and Refining Pores:
- Controlling oil and skin thickness: a daily 2% salicylic acid (BHA) solution combined with laser toning (1064 nm Nd:YAG) shrinks the sebaceous glands and reduces surface roughness.
- Collagen remodeling and tightening: radiofrequency (RF) microneedling works deep in the dermis to reorganize thickened, disordered collagen fibers, soften deep wrinkles and firm sagging soft tissue.
