I haven't looked into all the possibilities given by the second reference below (apex, angle, gulf, trough, corner, and triangle), but did find examples with 'apex'.

A receding hairline may develop just after the end of puberty or anytime throughout adulthood in both men and women. It is more than an inch higher than your juvenile hairline, with deepening temporal recessions and fine, miniaturised hair.
https://drbonaros.com/characteristics-of-a-natural-looking-h...

The terminology used for scalp topography has limitations as well. The terms vertex and crown are often used interchangeably. The frontal area has been called hairline, transition zone, tuft, and forelock; and the frontal-temporal recession called the apex, angle, gulf, trough, corner, and triangle.
https://www.ishrs-htforum.org/content/19/6/195

"Specified areas (1cm2 ) in the hairline, including frontal, temporal apex, and temporal point areas, were digitally photographed using 10× magnifi cation. Images were downloaded, and follicular units were circled, and numbered to achieve the count (Figure 1)"
https://www.ishrs-htforum.org/content/htfi/19/2/local/front-...

Something to be going on with ...



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Note added at 22 hrs (2023-04-07 09:58:35 GMT)
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As the definition Asker gives of golfe temporal says, it is the Zone anatomique du cuir chevelu glabre, située, à droite ou à gauche, en arrière du front entre les régions frontale et temporale droite ou gauche. It is therefore not 'in the temple area', as has been suggested, but between the temple area and the frontal tuft. But if it matters little how precise the localisation of the carcinoma is ...