Generalized eruptive keratoacanthoma

Generalized eruptive keratoacanthoma (also known as Grzybowski syndrome or generalized eruptive keratoacanthoma of Grzybowski) is an extremely rare skin condition in which hundreds to thousands of small, dome-shaped skin growths called keratoacanthomas appear across the body. These growths typically have a firm, raised border with a central crater or plug filled with a hard, keratin-like material. They can appear on the face, trunk, arms, and legs, and sometimes even affect the mucous membranes of the mouth, lips, and eyes. The condition can cause intense itching and significant discomfort. Unlike a single keratoacanthoma, which often resolves on its own, the generalized eruptive form tends to persist and can be very difficult to manage. The exact cause of generalized eruptive keratoacanthoma is not fully understood. It is not clearly linked to a single gene mutation, and most cases appear to occur sporadically without a family history. Some researchers believe it may be related to immune system dysfunction or abnormal responses in the skin's hair follicle cells. The condition is distinct from other forms of multiple keratoacanthomas, such as Ferguson-Smith type, which has a known genetic basis. Treatment is challenging because of the sheer number of lesions. Options include oral retinoids (such as acitretin or isotretinoin), which can help slow the growth of new lesions and reduce existing ones. Other treatments that have been tried include methotrexate, cyclophosphamide, fluorouracil (topical or intralesional), and surgical removal of individual lesions when feasible. Unfortunately, no single treatment is consistently effective, and the condition often requires long-term management with a combination of approaches.

Bring these to your next appointment

• Q1.How can you be sure these growths are keratoacanthomas and not skin cancer?,What treatment options are best for my specific situation?,What are the side effects of oral retinoids, and how long will I need to take them?,How often should I come in for skin checks and monitoring?,Are there any clinical trials or new treatments being studied for this condition?,Should I be tested for other conditions that cause multiple skin growths, like Muir-Torre syndrome?,What can I do to manage the itching and discomfort at home?

Common questions about Generalized eruptive keratoacanthoma

Related conditions

Other rare diseases commonly researched alongside Generalized eruptive keratoacanthoma.

• Muir-Torre syndrome→