Introduction: Terra firma-forme dermatosis (TFFD) is a benign condition characterized by hyperpigmented patches that resist routine washing yet are removable with isopropyl alcohol. Observing TFFD on the scalp is an exceptional event. Case Presentation: A 9-year-old female with ectodermal dysplasia and features of diffuse alopecia areata presented with multiple brown patches on the scalp. Trichoscopic examination revealed cluster of brown dots arranged in single files forming multiple curved lines that resemble a fingerprint pattern composed of dots. The lesions were completely removed by rubbing with isopropyl alcohol-soaked gauze. Discussion: This case introduces a novel trichoscopic pattern in scalp TFFD, expanding the diagnostic spectrum of the condition. The rapid resolution with isopropyl alcohol confirms the diagnosis, underscoring the utility of trichoscopy as a noninvasive diagnostic tool in complex scalp disorders.

1.
Unal
E
,
Guarneri
C
,
Chokoeva
AA
,
Wollina
U
,
Tchernev
G
.
Terra firma-forme dermatosis
.
Wien Med Wochenschr
.
2017
;
167
(
3–4
):
66
9
.
2.
Sechi
A
,
Patrizi
A
,
Savoia
F
,
Leuzzi
M
,
Guglielmo
A
,
Neri
I
.
Terra firma-forme dermatosis: a systematic review
.
Int J Dermatol
.
2021
;
60
(
8
):
933
43
.
3.
Mathieu
M
,
Dehavay
F
,
Richert
B
.
“Terra firma-forme dermatosis” on the proximal nail fold
.
J Eur Acad Dermatol Venereol
.
2024
.
4.
Mallari
R
,
Sinclair
RD
.
Terra firme-forme dermatosis of the scalp
.
Br J Dermatol
.
2002
;
147
(
5
):
1019
.
5.
Sechi
A
,
Patrizi
A
,
Savoia
F
,
Neri
I
.
Terra firma-forme dermatosis
.
Clin Dermatol
.
2021
;
39
(
2
):
202
5
.
6.
Errichetti
E
,
Stinco
G
.
Dermoscopy in terra firma-forme dermatosis and dermatosis neglecta
.
Int J Dermatol
.
2017
;
56
(
12
):
1481
3
.
7.
Elmas
ÖF
,
Uyar
B
,
Kilitçi
A
,
Kutlu
Ö
.
Dermoscopic patterns of terra firma-forme dermatosis
.
Dermatol Online J
.
2020
;
26
(
5
):
13030/qt6j78216z
.
8.
Chen
X
,
Zhang
J
,
Zhou
C
.
Dermatosis neglecta of the scalp complicated with alopecia areata
.
Int J Trichology
.
2020
;
12
(
3
):
138
9
.
9.
Gilbertson
K
,
Jarrett
R
,
Bayliss
SJ
,
Berk
DR
.
Scalp discoloration from selenium sulfide shampoo: a case series and review of the literature
.
Pediatr Dermatol
.
2012
;
29
(
1
):
84
8
.
You do not currently have access to this content.