What Is the CCCA Assessment Tool (C-CAT) for Hair Loss?

The CCCA Clinical Assessment Tool (C-CAT) is a scoring system developed by researchers to help dermatologists quantify the symptoms and inflammation of Central Centrifugal Cicatricial Alopecia (CCCA) over time ^[1]. Rather than just measuring the overall amount of hair lost, the C-CAT provides a structured way to track the symptoms you feel and the physical signs of disease activity on your scalp ^[1]. By calculating this score at your appointments, your care team can better understand whether treatments are calming the inflammation or if the disease is still active ^[1].

How the C-CAT is Scored

The tool evaluates five specific areas, or domains. Your dermatologist assigns a score from 0 (none or mild) to 2 (severe) for each category, based on their clinical judgment and your reported symptoms. These are added together for a total score ranging from 0 to 10 ^[1]:

• Pruritus (Itching): How frequently and intensely your scalp itches.
• Erythema (Redness): The amount of visible redness or inflammation around the hair follicles.
• Pain: Any pain or soreness you experience on your scalp.
• Disease Progression: Whether you or your doctor have noticed the area of hair loss spreading since your last evaluation.
• Scalp Resistance: How the scalp tissue feels to the touch (such as firmness, thickening, or scarring).

A score that decreases over time generally suggests a reduction in disease activity (less inflammation and fewer symptoms) ^[1]. In one retrospective study of 82 patients treated for at least six months, 88% saw their C-CAT scores improve ^[1]. However, it is important to understand that this was a single study group, and an improved score does not guarantee that progression has completely stopped for an individual patient.

What the Score Can and Cannot Tell You

• It CAN: Help track changes in your subjective symptoms (like pain and itching) and visible surface inflammation over time.
• It CANNOT: Measure all permanent hair loss, predict if your hair will regrow, or serve as a standalone diagnosis.

Crucially, reducing inflammation does not restore hair follicles that have already been permanently scarred ^[2]. A better C-CAT score generally means better disease control, but medical treatments for CCCA are primarily aimed at stopping or slowing further permanent loss, not regrowing heavily scarred areas ^[2]. Furthermore, CCCA can sometimes progress without noticeable pain or itching, so a low symptom score does not replace regular professional scalp examinations.

Limitations and Additional Tracking Methods

While the C-CAT is a useful tracking tool, it relies heavily on subjective factors—like how much pain you feel or one doctor’s personal judgment of redness. Because of this, scores might vary slightly if you see different dermatologists ^[1].

Because the C-CAT focuses on disease activity rather than measuring the exact extent of permanent hair loss ^[1], dermatologists often interpret C-CAT trends alongside other objective tracking methods:

• Standardized Photography: Taking photos of your scalp at the same angle, distance, hair parting, and lighting to visually track changes in hair density over time ^[3].
• Trichoscopy: Using a specialized magnifying tool in the clinic (a dermatoscope) to look closely at the scalp. Doctors look for findings that may support a CCCA diagnosis or indicate active disease, such as broken hairs or white-gray rings (peripilar halos) around the follicles ^[4].
• Checking for Scales and Pustules: Doctors will evaluate your scalp for flaking (scaling) or pus-filled bumps (pustules). One study found these features may be associated with a higher chance of the condition worsening over time ^[5]. However, pustules can also be caused by other issues, like infections, which require different treatments.

Note: If you notice new pus-filled bumps, marked pain, spreading redness, or drainage between routine appointments, contact your dermatologist for an evaluation, as these may require prompt attention.