microstomia

Hemifacial microstomia appears to be an intermediate form.

These included two or more features of distal arthrogryposis: microstomia, whistling-face, nasolabial creases, and 'H-shaped' chin dimple.

LaTrenta GS, Grant RT, Haworth RD, et al.: Functional Reconstruction for Severe Post-Burn Microstomia: A Case Report.

Recessive dystrophic epidermolysis bullosa (also known as "Hallopeau-Siemens variant of epidermolysis bullosa" and "Hallopeau-Siemens disease") is a skin condition resulting from mutations in the gene encoding type VII collagen, COL7A1, characterized by debilitating oral lesions that produce pain, scarring, and microstomia.