Could this be fat loss or Parry Romberg disease? I'm 42. Just started noticing the last couple years (Photo)

Parry Romberg syndrome has many different presentations. A history of change comparing pictures with an examination is probably the best way to confirm the diagnosis. Mild cases are often undiagnosed.
The treatment remains the same whether formally diagnosed or not. The only thing that changes is the prognosis.
With a confirmed diagnosis patients can expect the condition to potentially worsen though some cases never do.
Fillers and fat transfer are typically the best options for mild cases.
Severe cases typically require free tissue transfer.
Fat transfer compared to fillers is unpredictable, imprecise and can be unforgiving.
When attempting permanent solutions like fat transfer who you choose to do the procedure is the most important variable.
Best,
Mats Hagstrom MD